init v2.1.2
updated READMEs (formating)
updated READMEs (fix mistakes)
updated READMEs (extra space)
more robust mapping (canonical <- records)
added `.isbntools.conf` file for UNIX systems
flake8 ok
setup isbntools.conf
updated CHANGES.txt
more keywords setup.py
updated READMEs (conf)
create `setconf`
updated MANIFEST
WPNoAPIKeyError
release 2.1.2