Merge pull request #2 from xranby/master

Use gdx-joal for gdx-backend-jogl
Quick and dirty try of NEWT and Raspberry PI

Changed rendering surface from JFrame + GLCanvas to GLWindow.

* Works OK on Windows

Issue on RPI

* Mouse and keyboard events not captured in RPI, in console or Xwindow
* Canvas resizing issue
* Music playback performance
Prebuild binary with NEWT stuff
NEWT port (work in progress, bad detection of OpenGL version on
Raspberry Pi, brutal exit, ...)
Cleaner exits in the NEWT port
Adds a special case for MESA into the detection of the proper GL
abstraction to use
Uses the build-in animator of JOGL 2.0 instead of JoglAnimator (from
LibGDX)
Merging with main head
Added workarounds for Raspberry PI
- GLCaps has to explicitly set to GLES2
- Parsing of GLES version failed 
Applet support (work in progress) and moves some Swing dependencies to
JoglAWTInput
New backend jar with stuff from main head
Applet and AWT canvas/frame support (work in progress, untested)
Treats the special case of the Raspberry Pi -> forces ES2
Uses a more general and more robust detection of the proper GL
abstraction to use
Uses the default profile instead of forcing the maximum fixed one
Merging with Guessej/5968899d07a426c89f81ff5d6c794350594f88ff
Merge branch 'master' of http://github.com/gouessej/libgdx