add Album constructor to AlbumInfo and simplify info in Album
return empty list instead of null in MPD.getArtists(Genre)
avoid NPE in Album Parcel
avoid NPE in getFirstTrack
Fix #377 thanks to Craig
Merge branch 'master' of ssh://github.com/abarisain/dmix
Merge pull request #384 from hurzl/fixes

A few fixes
Fix #369 : Invalid albums in the artist view