[REF] auto-fix conventions
Fix pylint warnings
use raw string in regexp
sort the lines of the dictionary

I sorted 2 blocks separately, according to the comments.
The goal is to ease finding duplicate keys.
remove 2 duplicate entries in the dictionary
fix blank lines
break circular imports
Merge pull request #63 from mdietrichc2c/fix-pylint

[REF] auto-fix conventions (+ manual fixes)