Translation cleanups

A number of cleanups and disentanglements to the current translator implementations:

• Extract a real abstract Translator interface
• Remove the mapping based approach from the FloatTranslator to make it actually accept floating point values unequal exact integers

saqc/core/translation/__init__.py

@@ -7,8 +7,8 @@
 # -*- coding: utf-8 -*-
 from saqc.core.translation.basescheme import (
     FloatScheme,
-    SimpleScheme,
     MappingScheme,
+    SimpleScheme,
     TranslationScheme,
 )
 from saqc.core.translation.dmpscheme import DmpScheme