Merge pull request #525 from avuton/next

MPDStatus refurbish, StreamingService fixes, other cleanups and fixes
MPDroid: Move all ACTION_(action) fields to ACTION_MPD_(action).

Apparently, Android sends ACTION_STOP to broadcast receivers on user switch, which
conflicted with NotificationService's ACTION_STOP. So, for example, change all
ACTION_STOP fields to ACTION_MPD_STOP.