Implemented cascading opacity feature. Added CCLayerRGBA and CCLayerColor cascading opacity tests to LayerTest.

Adds CCNodeRGBA and CCLayerRGBA. Both conform to the CCRGBAProtocol and propagate opacity to their children. CCSprite now inherits from CCNodeRGBA, and CCMenu from CCLayerRRGBA.

Enable/disable this feature using CC_CASCADING_OPACITY in ccConfig.h.

When this feature is enabled, all classes calculate their cumulative opacity from their own opacity and from parent's opacity. For example, if you create a CCLayerRGB (or any other CCNodeRGB0 with an opacity of 127 (50%), and then add a children CCSprite with an opacity of 127, the sprite draws as if having an opacity of 63 (25%).
Add SysTest for Project file.
CCProtocols: Making opacity and color properties in the CCRGBAProtocol.
1) Implemented cascading color to CCNodeRGBA and CCLayerRGBA (works in the same way as cascading opacity). Use the CC_CASCADING_COLOR option in ccConfig.h.
2) It is now possible to disable cascading opacity and cascading color at node level. Use cascadeOpacity and cascadeColor properties.
Enable [CCFileUtils removeSuffixFromFile:] on Mac.
Updates Xcode
Merge remote-tracking branch 'et1337/develop-v2' into develop-v2
Updates AUTHORS
Fixing a bug regarding an interaction of cascading opacity and cascading color affecting the unmodifiedColor variable within CCSprites.
Merge remote-tracking branch 'rsanchezsaez/rsanchezsaez-v2-cascading-opacity' into develop-v2

Conflicts:
	cocos2d-ios.xcodeproj/project.pbxproj
	cocos2d/CCAtlasNode.m
	cocos2d/CCLabelBMFont.h
	cocos2d/CCLabelBMFont.m
	cocos2d/CCMenu.h
	cocos2d/CCMenu.m
	cocos2d/CCSprite.h
	cocos2d/CCSprite.m
CCAtlasNode, CCLabelAtlas and CCTileMapAtlas use...

... "_" as prefix for ivars, not suffix
Merge remote-tracking branch 'rsanchezsaez/rsanchezsaez-v2-cascading-opacity' into develop-v2

Conflicts:
	cocos2d/CCLabelBMFont.m
	cocos2d/CCLayer.m
	cocos2d/CCNode.m
adds js-debug files to the iOS and OS X project

also updates the template information
Compiles in 32-bit mode

@syntethize and @property are synced
PhysicsSprite: small API changes

When Chipmunk is enabled:
`setBody:` -> `setCPBody:`

When Box2d is enabled:
`setBody:` -> `setB2Body:`
Compatibility fixes for BridgeSupport
Using new JSBindings
CCGrid: Using _ as prefix for ivars

…not as suffix
Adds filenameLookup to CCFileUtils

This new functionality lets "renames" files on runtime.
Useful for cross platform game development.
FileUtils: Improved API name...

...for filenameLookupDictionaryFromFile