Cleaned Views, implementes MokapViews#onBackPressed.
ProjectView and HomeView implement BackListener.
BackListener fix.
Added skin for switch widget
Added switch widget
Revised shadow in app icons
Merge pull request #852 from jtorrente/appicon-shadows

Revised shadow in app icons
Merge pull request #849 from RotaruDan/backButton

Back event implementation.
Merge pull request #850 from gorco/switch

Switch
Missing assets
Adds width and height to thumbnail.json.
Creates Navigation widget.
Adds Navigation to SceneView.