FileAction for music files, RestAngular 1.2.1

 * add api call to resolve track by fileid
 * AngularJS route 'file/:id'
 * PlayerController.playFile(id)
 * load fileactions script on every page to register FileAction
 * fix CSS style - remove comma
 * RestAngular 1.2.1
 * fix some global variables
Merge pull request #125 from owncloud/open_in_music_fileaction

Open in music fileaction