Merge branch 'release/0.5.2-beta' into develop
Interface.action now removes parameters with 'None' values
'title' and 'year' is now optional on 'library', 'seen', 'unlibrary' methods, added validation to ensure at least one identifier is specified.
Renamed MediaInterface 'cancel_watching' to 'cancelwatching'
Fixed bug in Interface.action when no data is being sent
Fixed a bug where 'None' was falsely returned
Bumped version to 0.5.3
Merge branch 'release/0.5.3-beta'