add webgl render commands for PhysicsDebugNode and PhysicsSprite
Merge pull request #2285 from dingpinglv/Iss5941_WebGLRenderer

Issue #5941: Fixed a bug of cc.Sprite that its transform is incorrect when it flipped
Merge pull request #2284 from joshuastray/new_renderer

add webgl render commands for PhysicsDebugNode and PhysicsSprite
Issue #5941: Let effects work.