widen tolerance for 16:9 check on last.fm images
MB search now validates based on releases, then recordings, then works
updated changelog
updated version number
code cleanup
updated musicbrainz search to better handle featured artists and calls from external addons
code cleanup
fix for incorrect logic when looking for local artwork
fixes for logic of when musicbrainz ID lookup happens
built more tolerance for when XMBC doesn't return album to song title
fix for cached artist images not getting merged for featured artists