Change description/title, libGDX API changes and more.

This pr among other improvements 
* Fixes libGDX API changes libgdx/libgdx@d35eb11ba71a4e571c6cd36723cf326cca059ae3, more info in the [blog](http://www.badlogicgames.com/wordpress/?p=3322). How affects ead can be seen here RotaruDan/ead@91598515e75d4e498b8cd23ca4c0e9a97e042749.
* Adds the possibility to change the title and description of Scenes/Elements (the latter not tested yet because there si no Note for SceneElements).
* Fixes other minor bugs.