Harm bug fixes

See merge request !19

redetermined interpolation behaviour for frequency aligned values, seperated by a margin exactly sized 2*freq

     the output dataset

        flagger.setFlags method

Executable: Add the DMP-Flagger

See merge request !18

        pd.DataFrame

Python3.8

See merge request !16

reader update

See merge request !15

- newly assigned variables are only written into the flags DataFrame
- if we used such a variable in a dsl function down the line, the lookup failed

        were not available in flagger based dsl function (e.g. isflagged)

replaced offset string utilization by real Offsets to circumvent freqstring-offsetstring uncoherence