create sounds directory
Merge branch 'ide' of gh:Catrobat/Catty into ide_iTunesFileSharing

* 'ide' of gh:Catrobat/Catty:
  CatrobatTableViewController scrolling enabled
detect playable audio files
Merge branch 'development' of gh:Catrobat/Catty into ide

* 'development' of gh:Catrobat/Catty:
  delegate to reloadData in ProgramDetailViewController