Update revision on change of backgroundDownloadList as well
Fix songs in background download list not being taken off in view
Close #137 Break down playlists into separate server categories
Make offline playlist more robust + only show server name if there exists a playlist for more then one server
Close #136 Keep a permanent cache of version
Add blank option to genre list
Add option to display track number in front of song titles
Convert a few things over to use R.string
Fix low quality album art with larger widgets