BibClassify: API string support
- Add new API function bibclassify_exhaustive_call_text to run BibClassify on a string.
- Performs module-wide PEP8 and PEP257 updates.
Reviewed-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
Signed-off-by: Guillaume Lastecoueres <PX9e@gmx.fr>