Removing files that shouldn't be tracked in version control

It's generally a good idea to ignore any compiled output so that there are no machine-dependent files that could cause issues for others.

e.g. in .gitignore
**/obj
**/bin
Sphero Connection

• Changed the order of view additions to show the Sphero connection view on top of the GLView
• Gave the Sphero connection view a semi-transparent background so that it covers up what's behind it a little
• Updated the .gitignore with rules for compiler output
Disc working with Sphero!

• Added the ability to deliver a yaw value to native C++ code so that cocos2d-x can update the disc's rotation.

Signed-off-by: Brandon Dorris <brandon@orbotix.com>