Add MPD cache and operation stubs, to ease future merges
Merge pull request #75 from mdlayher/mpd_stub

Add MPD cache and operation stubs, to ease future merges
Delete user session with action killSession and rowId integer
Merge pull request #77 from mdlayher/user_session

Delete user session with action killSession and rowId integer
Merge branch 'master' of github:einsteinx2/WaveBox