Changelog

`3.1` - 2021-04-29

Rename exceptions to conventional PEP8 naming syntax, e.g tvdb_error becomes TvdbError, tvdb_episodenotfound becomes TvdbEpisodeNotFound etc. All exceptions have changed. Backwards-compatible bindings to old names exist until next version (i.e will be removed in version 3.2)
Deprecate Tvdb(forceConnect=...) argument - had no effect in recent versions, and argument removed in next version.
New TvdbDataNotFound exception allows catching of all missing-data exceptions in on (TvdbShowNotFound, TvdbSeasonNotFound, TvdbEpisodeNotFound, TvdbResourceNotFound are now all subclasses of this)
Fix ImportError: cannot import name '_to_bytes' error due to change in requests-cache 0.6.0 - issue #92
TVDB v1 API compatbility remapping has been removed: for example t[show][1][23]['seriesname'] must now be t[show][1][23]['seriesName']

Reupload to PyPI to hopefully fix markdown rendering on PyPI page (may be related to this bug)

Important: Your own API key is now required to use this module. The default shared API key has been removed. Keys are easy to register via https://thetvdb.com/api-information
Include cache location info in debug logging
Drop support for Python 2.6 (EOL 2016), 3.3 (EOL 2013), 3.4 (EOL 2019)
Removed deprecated Tvdb(debug=...) argument - use logging module instead. E.g logging.basicConfig(level=logging.DEBUG)
Removed long deprecated tvdb_ui and tvdb_exceptions modules. Everything in these are accessible via the tvdb_api module
Correctly errors when failing to find show by ID - issue #54
Web-cache filename contains major version of Python to support side-by-side usage of tvdb_api in Python 2 and 3
Fix bug causing occasional KeyError when looking up lots of shows. PR #65