diff --git a/check-results/cran/3.0.1/debian/00check.log b/check-results/cran/3.0.1/debian/00check.log
deleted file mode 100644
index 4f6eea58630a35526a8575869854977171c16f3a..0000000000000000000000000000000000000000
--- a/check-results/cran/3.0.1/debian/00check.log
+++ /dev/null
@@ -1,75 +0,0 @@
-* using log directory ‘/srv/hornik/tmp/CRAN/stressaddition.Rcheck’
-* using R Under development (unstable) (2020-07-28 r78930)
-* using platform: x86_64-pc-linux-gnu (64-bit)
-* using session charset: UTF-8
-* checking for file ‘stressaddition/DESCRIPTION’ ... OK
-* checking extension type ... Package
-* this is package ‘stressaddition’ version ‘3.0.1’
-* package encoding: UTF-8
-* checking CRAN incoming feasibility ... NOTE
-Maintainer: ‘Sebastian Henz <sebastian.henz@ufz.de>’
-
-New submission
-
-Possibly mis-spelled words in DESCRIPTION:
-  Liess (25:24)
-  Phasic (3:22)
-  Tri (3:18)
-  al (25:33)
-  et (25:30)
-  phasic (23:12)
-  stressor (24:55)
-  toxicant (23:73)
-  toxicants (25:9)
-  tri (23:8)
-* checking package namespace information ... OK
-* checking package dependencies ... OK
-* checking if this is a source package ... OK
-* checking if there is a namespace ... OK
-* checking for executable files ... OK
-* checking for hidden files and directories ... OK
-* checking for portable file names ... OK
-* checking for sufficient/correct file permissions ... OK
-* checking whether package ‘stressaddition’ can be installed ... [2s/2s] OK
-* checking package directory ... OK
-* checking for future file timestamps ... OK
-* checking DESCRIPTION meta-information ... OK
-* checking top-level files ... OK
-* checking for left-over files ... OK
-* checking index information ... OK
-* checking package subdirectories ... OK
-* checking R files for non-ASCII characters ... OK
-* checking R files for syntax errors ... OK
-* checking whether the package can be loaded ... OK
-* checking whether the package can be loaded with stated dependencies ... OK
-* checking whether the package can be unloaded cleanly ... OK
-* checking whether the namespace can be loaded with stated dependencies ... OK
-* checking whether the namespace can be unloaded cleanly ... OK
-* checking loading without being on the library search path ... OK
-* checking use of S3 registration ... OK
-* checking dependencies in R code ... OK
-* checking S3 generic/method consistency ... OK
-* checking replacement functions ... OK
-* checking foreign function calls ... OK
-* checking R code for possible problems ... [4s/4s] OK
-* checking Rd files ... OK
-* checking Rd metadata ... OK
-* checking Rd line widths ... OK
-* checking Rd cross-references ... OK
-* checking for missing documentation entries ... OK
-* checking for code/documentation mismatches ... OK
-* checking Rd \usage sections ... OK
-* checking Rd contents ... OK
-* checking for unstated dependencies in examples ... OK
-* checking contents of ‘data’ directory ... OK
-* checking data for non-ASCII characters ... OK
-* checking data for ASCII and uncompressed saves ... OK
-* checking examples ... [5s/5s] OK
-* checking for unstated dependencies in ‘tests’ ... OK
-* checking tests ... [6s/6s] OK
-  Running ‘testthat.R’ [6s/6s]
-* checking PDF version of manual ... OK
-* checking for non-standard things in the check directory ... OK
-* checking for detritus in the temp directory ... OK
-* DONE
-Status: 1 NOTE
diff --git a/check-results/cran/3.0.1/debian/00install.out b/check-results/cran/3.0.1/debian/00install.out
deleted file mode 100644
index 7ce4b5ce1718b75db2758c67f4a2b2d0e3194148..0000000000000000000000000000000000000000
--- a/check-results/cran/3.0.1/debian/00install.out
+++ /dev/null
@@ -1,14 +0,0 @@
-* installing *source* package ‘stressaddition’ ...
-** using staged installation
-** R
-** data
-*** moving datasets to lazyload DB
-** inst
-** byte-compile and prepare package for lazy loading
-** help
-*** installing help indices
-** building package indices
-** testing if installed package can be loaded from temporary location
-** testing if installed package can be loaded from final location
-** testing if installed package keeps a record of temporary installation path
-* DONE (stressaddition)
diff --git a/check-results/cran/3.0.1/windows/00check.log b/check-results/cran/3.0.1/windows/00check.log
deleted file mode 100644
index eed557a0b406b4acb87876b708e8a3cc3020d742..0000000000000000000000000000000000000000
--- a/check-results/cran/3.0.1/windows/00check.log
+++ /dev/null
@@ -1,87 +0,0 @@
-* using log directory 'd:/RCompile/CRANincoming/R-devel/stressaddition.Rcheck'
-* using R Under development (unstable) (2020-07-28 r78930)
-* using platform: x86_64-w64-mingw32 (64-bit)
-* using session charset: ISO8859-1
-* checking for file 'stressaddition/DESCRIPTION' ... OK
-* checking extension type ... Package
-* this is package 'stressaddition' version '3.0.1'
-* package encoding: UTF-8
-* checking CRAN incoming feasibility ... NOTE
-Maintainer: 'Sebastian Henz <sebastian.henz@ufz.de>'
-
-New submission
-
-Possibly mis-spelled words in DESCRIPTION:
-  Liess (25:24)
-  Phasic (3:22)
-  Tri (3:18)
-  al (25:33)
-  et (25:30)
-  phasic (23:12)
-  stressor (24:55)
-  toxicant (23:73)
-  toxicants (25:9)
-  tri (23:8)
-* checking package namespace information ... OK
-* checking package dependencies ... OK
-* checking if this is a source package ... OK
-* checking if there is a namespace ... OK
-* checking for hidden files and directories ... OK
-* checking for portable file names ... OK
-* checking whether package 'stressaddition' can be installed ... OK
-* checking installed package size ... OK
-* checking package directory ... OK
-* checking for future file timestamps ... OK
-* checking DESCRIPTION meta-information ... OK
-* checking top-level files ... OK
-* checking for left-over files ... OK
-* checking index information ... OK
-* checking package subdirectories ... OK
-* checking R files for non-ASCII characters ... OK
-* checking R files for syntax errors ... OK
-* loading checks for arch 'i386'
-** checking whether the package can be loaded ... OK
-** checking whether the package can be loaded with stated dependencies ... OK
-** checking whether the package can be unloaded cleanly ... OK
-** checking whether the namespace can be loaded with stated dependencies ... OK
-** checking whether the namespace can be unloaded cleanly ... OK
-** checking loading without being on the library search path ... OK
-** checking use of S3 registration ... OK
-* loading checks for arch 'x64'
-** checking whether the package can be loaded ... OK
-** checking whether the package can be loaded with stated dependencies ... OK
-** checking whether the package can be unloaded cleanly ... OK
-** checking whether the namespace can be loaded with stated dependencies ... OK
-** checking whether the namespace can be unloaded cleanly ... OK
-** checking loading without being on the library search path ... OK
-** checking use of S3 registration ... OK
-* checking dependencies in R code ... OK
-* checking S3 generic/method consistency ... OK
-* checking replacement functions ... OK
-* checking foreign function calls ... OK
-* checking R code for possible problems ... [10s] OK
-* checking Rd files ... OK
-* checking Rd metadata ... OK
-* checking Rd line widths ... OK
-* checking Rd cross-references ... OK
-* checking for missing documentation entries ... OK
-* checking for code/documentation mismatches ... OK
-* checking Rd \usage sections ... OK
-* checking Rd contents ... OK
-* checking for unstated dependencies in examples ... OK
-* checking contents of 'data' directory ... OK
-* checking data for non-ASCII characters ... OK
-* checking data for ASCII and uncompressed saves ... OK
-* checking examples ...
-** running examples for arch 'i386' ... [11s] OK
-** running examples for arch 'x64' ... [10s] OK
-* checking for unstated dependencies in 'tests' ... OK
-* checking tests ...
-** running tests for arch 'i386' ... [13s] OK
-  Running 'testthat.R' [12s]
-** running tests for arch 'x64' ... [13s] OK
-  Running 'testthat.R' [12s]
-* checking PDF version of manual ... OK
-* checking for detritus in the temp directory ... OK
-* DONE
-Status: 1 NOTE
diff --git a/check-results/cran/3.0.1/windows/00install.out b/check-results/cran/3.0.1/windows/00install.out
deleted file mode 100644
index 7166300e90d489af6f282bf5aa26bb21884ee049..0000000000000000000000000000000000000000
--- a/check-results/cran/3.0.1/windows/00install.out
+++ /dev/null
@@ -1,18 +0,0 @@
-* installing *source* package 'stressaddition' ...
-** using staged installation
-** R
-** data
-*** moving datasets to lazyload DB
-** inst
-** byte-compile and prepare package for lazy loading
-** help
-*** installing help indices
-** building package indices
-** testing if installed package can be loaded from temporary location
-*** arch - i386
-*** arch - x64
-** testing if installed package can be loaded from final location
-*** arch - i386
-*** arch - x64
-** testing if installed package keeps a record of temporary installation path
-* DONE (stressaddition)
diff --git a/check-results/win-builder/3.0.0/00check.log b/check-results/win-builder/3.0.0/00check.log
deleted file mode 100644
index f9021d206fb0fcefff1087234ad1b99e26756383..0000000000000000000000000000000000000000
--- a/check-results/win-builder/3.0.0/00check.log
+++ /dev/null
@@ -1,84 +0,0 @@
-* using log directory 'd:/RCompile/CRANguest/R-devel/stressaddition.Rcheck'
-* using R Under development (unstable) (2020-07-28 r78930)
-* using platform: x86_64-w64-mingw32 (64-bit)
-* using session charset: ISO8859-1
-* checking for file 'stressaddition/DESCRIPTION' ... OK
-* checking extension type ... Package
-* this is package 'stressaddition' version '3.0.0'
-* package encoding: UTF-8
-* checking CRAN incoming feasibility ... NOTE
-Maintainer: 'Sebastian Henz <sebastian.henz@ufz.de>'
-
-New submission
-
-Possibly mis-spelled words in DESCRIPTION:
-  Phasic (3:22)
-  Tri (3:18)
-  phasic (23:12)
-  stressor (24:55)
-  toxicant (23:73)
-  toxicants (25:9)
-  tri (23:8)
-* checking package namespace information ... OK
-* checking package dependencies ... OK
-* checking if this is a source package ... OK
-* checking if there is a namespace ... OK
-* checking for hidden files and directories ... OK
-* checking for portable file names ... OK
-* checking whether package 'stressaddition' can be installed ... OK
-* checking installed package size ... OK
-* checking package directory ... OK
-* checking for future file timestamps ... OK
-* checking DESCRIPTION meta-information ... OK
-* checking top-level files ... OK
-* checking for left-over files ... OK
-* checking index information ... OK
-* checking package subdirectories ... OK
-* checking R files for non-ASCII characters ... OK
-* checking R files for syntax errors ... OK
-* loading checks for arch 'i386'
-** checking whether the package can be loaded ... OK
-** checking whether the package can be loaded with stated dependencies ... OK
-** checking whether the package can be unloaded cleanly ... OK
-** checking whether the namespace can be loaded with stated dependencies ... OK
-** checking whether the namespace can be unloaded cleanly ... OK
-** checking loading without being on the library search path ... OK
-** checking use of S3 registration ... OK
-* loading checks for arch 'x64'
-** checking whether the package can be loaded ... OK
-** checking whether the package can be loaded with stated dependencies ... OK
-** checking whether the package can be unloaded cleanly ... OK
-** checking whether the namespace can be loaded with stated dependencies ... OK
-** checking whether the namespace can be unloaded cleanly ... OK
-** checking loading without being on the library search path ... OK
-** checking use of S3 registration ... OK
-* checking dependencies in R code ... OK
-* checking S3 generic/method consistency ... OK
-* checking replacement functions ... OK
-* checking foreign function calls ... OK
-* checking R code for possible problems ... [8s] OK
-* checking Rd files ... OK
-* checking Rd metadata ... OK
-* checking Rd line widths ... OK
-* checking Rd cross-references ... OK
-* checking for missing documentation entries ... OK
-* checking for code/documentation mismatches ... OK
-* checking Rd \usage sections ... OK
-* checking Rd contents ... OK
-* checking for unstated dependencies in examples ... OK
-* checking contents of 'data' directory ... OK
-* checking data for non-ASCII characters ... OK
-* checking data for ASCII and uncompressed saves ... OK
-* checking examples ...
-** running examples for arch 'i386' ... [9s] OK
-** running examples for arch 'x64' ... [10s] OK
-* checking for unstated dependencies in 'tests' ... OK
-* checking tests ...
-** running tests for arch 'i386' ... [13s] OK
-  Running 'testthat.R' [12s]
-** running tests for arch 'x64' ... [12s] OK
-  Running 'testthat.R' [12s]
-* checking PDF version of manual ... OK
-* checking for detritus in the temp directory ... OK
-* DONE
-Status: 1 NOTE
diff --git a/check-results/win-builder/3.0.0/00install.out b/check-results/win-builder/3.0.0/00install.out
deleted file mode 100644
index 87a6ebc9c26fd1177b5ad8f58ae49d81fc15d3e7..0000000000000000000000000000000000000000
--- a/check-results/win-builder/3.0.0/00install.out
+++ /dev/null
@@ -1,20 +0,0 @@
-* installing *source* package 'stressaddition' ...
-** using staged installation
-** R
-** data
-*** moving datasets to lazyload DB
-** inst
-** byte-compile and prepare package for lazy loading
-** help
-*** installing help indices
-** building package indices
-** testing if installed package can be loaded from temporary location
-*** arch - i386
-*** arch - x64
-** testing if installed package can be loaded from final location
-*** arch - i386
-*** arch - x64
-** testing if installed package keeps a record of temporary installation path
-* MD5 sums
-packaged installation of 'stressaddition' as stressaddition_3.0.0.zip
-* DONE (stressaddition)
diff --git a/check-results/win-builder/3.0.1/00check.log b/check-results/win-builder/3.0.1/00check.log
deleted file mode 100644
index a3937f63aa0ad11ff69668f8862b98fcbc77a10a..0000000000000000000000000000000000000000
--- a/check-results/win-builder/3.0.1/00check.log
+++ /dev/null
@@ -1,87 +0,0 @@
-* using log directory 'd:/RCompile/CRANguest/R-devel/stressaddition.Rcheck'
-* using R Under development (unstable) (2020-07-28 r78930)
-* using platform: x86_64-w64-mingw32 (64-bit)
-* using session charset: ISO8859-1
-* checking for file 'stressaddition/DESCRIPTION' ... OK
-* checking extension type ... Package
-* this is package 'stressaddition' version '3.0.1'
-* package encoding: UTF-8
-* checking CRAN incoming feasibility ... NOTE
-Maintainer: 'Sebastian Henz <sebastian.henz@ufz.de>'
-
-New submission
-
-Possibly mis-spelled words in DESCRIPTION:
-  Liess (25:24)
-  Phasic (3:22)
-  Tri (3:18)
-  al (25:33)
-  et (25:30)
-  phasic (23:12)
-  stressor (24:55)
-  toxicant (23:73)
-  toxicants (25:9)
-  tri (23:8)
-* checking package namespace information ... OK
-* checking package dependencies ... OK
-* checking if this is a source package ... OK
-* checking if there is a namespace ... OK
-* checking for hidden files and directories ... OK
-* checking for portable file names ... OK
-* checking whether package 'stressaddition' can be installed ... OK
-* checking installed package size ... OK
-* checking package directory ... OK
-* checking for future file timestamps ... OK
-* checking DESCRIPTION meta-information ... OK
-* checking top-level files ... OK
-* checking for left-over files ... OK
-* checking index information ... OK
-* checking package subdirectories ... OK
-* checking R files for non-ASCII characters ... OK
-* checking R files for syntax errors ... OK
-* loading checks for arch 'i386'
-** checking whether the package can be loaded ... OK
-** checking whether the package can be loaded with stated dependencies ... OK
-** checking whether the package can be unloaded cleanly ... OK
-** checking whether the namespace can be loaded with stated dependencies ... OK
-** checking whether the namespace can be unloaded cleanly ... OK
-** checking loading without being on the library search path ... OK
-** checking use of S3 registration ... OK
-* loading checks for arch 'x64'
-** checking whether the package can be loaded ... OK
-** checking whether the package can be loaded with stated dependencies ... OK
-** checking whether the package can be unloaded cleanly ... OK
-** checking whether the namespace can be loaded with stated dependencies ... OK
-** checking whether the namespace can be unloaded cleanly ... OK
-** checking loading without being on the library search path ... OK
-** checking use of S3 registration ... OK
-* checking dependencies in R code ... OK
-* checking S3 generic/method consistency ... OK
-* checking replacement functions ... OK
-* checking foreign function calls ... OK
-* checking R code for possible problems ... [8s] OK
-* checking Rd files ... OK
-* checking Rd metadata ... OK
-* checking Rd line widths ... OK
-* checking Rd cross-references ... OK
-* checking for missing documentation entries ... OK
-* checking for code/documentation mismatches ... OK
-* checking Rd \usage sections ... OK
-* checking Rd contents ... OK
-* checking for unstated dependencies in examples ... OK
-* checking contents of 'data' directory ... OK
-* checking data for non-ASCII characters ... OK
-* checking data for ASCII and uncompressed saves ... OK
-* checking examples ...
-** running examples for arch 'i386' ... [8s] OK
-** running examples for arch 'x64' ... [10s] OK
-* checking for unstated dependencies in 'tests' ... OK
-* checking tests ...
-** running tests for arch 'i386' ... [11s] OK
-  Running 'testthat.R' [11s]
-** running tests for arch 'x64' ... [13s] OK
-  Running 'testthat.R' [12s]
-* checking PDF version of manual ... OK
-* checking for detritus in the temp directory ... OK
-* DONE
-Status: 1 NOTE
diff --git a/check-results/win-builder/3.0.1/00install.out b/check-results/win-builder/3.0.1/00install.out
deleted file mode 100644
index 6b8288290b9f0962d36d468ecc067fb31a47a021..0000000000000000000000000000000000000000
--- a/check-results/win-builder/3.0.1/00install.out
+++ /dev/null
@@ -1,20 +0,0 @@
-* installing *source* package 'stressaddition' ...
-** using staged installation
-** R
-** data
-*** moving datasets to lazyload DB
-** inst
-** byte-compile and prepare package for lazy loading
-** help
-*** installing help indices
-** building package indices
-** testing if installed package can be loaded from temporary location
-*** arch - i386
-*** arch - x64
-** testing if installed package can be loaded from final location
-*** arch - i386
-*** arch - x64
-** testing if installed package keeps a record of temporary installation path
-* MD5 sums
-packaged installation of 'stressaddition' as stressaddition_3.0.1.zip
-* DONE (stressaddition)
diff --git a/check-results/win-builder/readme.md b/check-results/win-builder/readme.md
deleted file mode 100644
index 51923e503b3a81a9d7e6e88e1d1b05c0aa02b528..0000000000000000000000000000000000000000
--- a/check-results/win-builder/readme.md
+++ /dev/null
@@ -1,9 +0,0 @@
-Run `devtools::check_win_devel()` to check in the development version of R under windows. The results will be e-mailed to the address of the maintainer. In some cases it can take almost a day, so be patient. Then save 00check.log and 00install.out in this directory.
-
-
-This note here can be ignored:
-```
-* checking CRAN incoming feasibility ... NOTE
-Maintainer: 'Sebastian Henz <sebastian.henz@ufz.de>'
-```
-It just tells CRAN that it should only accept submissions from the maintainer's e-mail address. See https://stackoverflow.com/questions/23829978/checking-cran-incoming-feasibility-note-maintainer