Aurora.js

* aurora.js v0.4.2
* mp3.js v0.1.0
* flac.js v0.1.2
Use WebDAV to access music files - this supports HTTP range requests

* chunk size of 512 KB
* use injected Audio object in player controller
* fix the unit tests
Getting aurora.js to work with music app

* this was developed by Pellaeon Lin and Gigen Chang
update seeking to work with aurora.js
last fixes
drop unused code
Merge pull request #278 from owncloud/pr-aurora

Integrate with Aurora.js framework