Initial commit of CCEffectBrightnessAndContrast
Fill out CCEffectBrightnessAndContrast and add a test to CCRendererTest
Merge branch 'develop' into thayer/brightnessAndContrast

Conflicts:
	cocos2d-ios.xcodeproj/project.pbxproj
Add initWithBrightness:(float)brightness contrast:(float)contrast initializer
Move brightness and contrast test later in the test list
Merge branch 'develop' into thayer/brightnessAndContrast

Conflicts:
	cocos2d-ui-tests/tests/CCRendererTest.m