fix jbpToAngle
Merge pull request #21 from nside/master

Fix 
=> jbpToAngle
Refactored OSX App Delegates

* Scene start is now clearly within the ApplicationDidFinishLauching
* Removal of instance variables and using getter methods with memoization
* Size of the window is now clearly defined in a method
* Window is automatically centered on the screen
* Window automatically accepts mouse movement events
Fix
  => Exception on window close
Merge branch 'master' of github.com:rubymotion/Joybox
Merge pull request #24 from burtlo/osx-templates-refactor

Fix:
=> Refactored OSX App Delegates
Fix:
  => Remove the setMouseEvents set to true by default
Add:
=> Tracking Area for GLView
Add:
  => Commented line to handle on_mouse_moved events
Supprot text alignment for Label