Updated the way 409 responses work
Updated UDJ REST API 0.6 (markdown)
Fixed attribute names on played playlist entries.
Fixed formatting issue and added call for retreiving song sets.
Merge branch 'master' of github.com:klnusbaum/UDJ.wiki Conflicts: UDJ-REST-API-0.6.md
Added calls for favoriting
Merge branch 'master' of github.com:klnusbaum/UDJ.wiki
Added an API call to allow a client to indicate that the currently playing song has finished.