Delegate album_for_id to plugins if no MusicBrainz match is found
Add support for manually entered release ID in Discogs
Determine IDs from MusicBrainz and Discogs URLs
Fix tests for albums from manual ID
Return a list of candidates in hooks._album_for_id
Improve regular expression for Discogs IDs
Fix bug in discogs.album_for_id for ID-Strings that end in a bracket
Make regex for Discogs ID more specific
Merge pull request #291 from jbaiter/discogs_albumid

Support for manually entered IDs in plugins