v3.3.3, 2014-06-16 -- Initial release (based in `isbntools 3.3.3)`.
v3.3.4, 2014-06-16 -- Fix small bug with wheel package (based in `isbntools 3.3.3)`.
v3.3.5, 2014-06-22 -- Fix bug in 'notisbn' (based in `isbntools 3.3.4)`.
v3.3.6, 2014-06-30 -- Small improvements and optional ShelveCache.
v3.3.7, 2014-07-07 -- Fix issue #2, better debug logging and expose top exceptions.
v3.3.8, 2014-07-07 -- Fix wrong logging identifier.
v3.3.9, 2014-07-13 -- Mark as not valid ISBN-13 in series not allocated yet.
v3.4.1, 2014-07-16 -- Fix bug #7 and small improvements on the API.
v3.4.2, 2014-08-13 -- Add `doi2tex` and updated data.
v3.4.3, 2015-01-13 -- Better LOOSE regex and allow 'x' in canonical.
