CI: add PEP8, Pylint, and comparative tests
Candidate (to-be-merged) version is compared against merge base (git merge-base master..HEAD). New PEP8 or Pylint defects are show stopper. Tests results for non-modified rpl files must not change.
Candidate (to-be-merged) version is compared against merge base (git merge-base master..HEAD). New PEP8 or Pylint defects are show stopper. Tests results for non-modified rpl files must not change.