Remote command ToggleContextMenu
- map toggleContextMenu to ToggleContextPanel for playing media
Merge remote-tracking branch 'upstream/master'
 #105 Implement NextTrack command for multi-file playback
Fixed threading bug causing next/prev track to hang
Merge remote-tracking branch 'upstream/master'

Conflicts:
	MediaBrowser.Theater.DirectShow/InternalDirectShowPlayer.cs
Merge pull request #187 from shaunarundell/master

Close #105 Implement NextTrack command for multi-file playback