#127 - Create "disc launcher" app - part 1
#127 - Create "disc launcher" app - part 2
Merge remote-tracking branch 'upstream/master'
#127, #100 - Create "disc launcher" app - part last
- Support disc launcher app
- Support placeholder files (move.disc) on server
Merge pull request #135 from shaunarundell/master

External Disk Player App & IsPlaceHolder implementation