New main menu
Merge pull request #10 from tmanouilidis/master

New main menu
Merge pull request #9 from themetalmuncher/master

More Simple app updates
[improved] hookmanager
[added] helpmenu
[added] loadscreen
[added] debugmessages
[fixed] previous commit
[improved] loading: doesn't blend in the beginning
[added] option to hide apps in cockpit view
[removed] unnecessary logs
[improved] creditsscreen
[improved] credits / menu css
[fixed] persistance bug
[added] appImages
[improved] angle apps - split roll and pitch into separate apps
[fixed] misc. small fixes and changes