In display.lua
add display.newDrawNode;
add display.newFilteredSprite;
add display.printscreen;
simplify display.newScale9Sprite;
modify display.newTiledBatchNode;
modify display.newSprite to accept the fourth parametere;
modify display.addSpriteFrameWithFile to accept async handler.

In functions.lua
add math.angle2Radian;
add math.radian2Angle;

In network
add network.uploadFile

In CCSpriteExtend.lua
add CCSpriteExtend:getColor
add CCSpriteExtend:getColorAlpha

add CCDrawNodeExtend.lua
add filters support.
add filter file to win32 project
Merge pull request #261 from zrong/develop

Add filters and some new features.