rolling back physics in layer
rolling back tests
Merge pull request #6545 from ricardoquesada/physics_rollback

Physics rollback
Updated changelog
Merge pull request #6547 from ricardoquesada/changelog

Updated changelog
[AUTO]: updating luabinding automatically
Merge pull request #6548 from CocosRobot/update_lua_bindings_1398990974

[AUTO]: updating luabinding automatically
Lua compiles again
Merge pull request #6549 from ricardoquesada/rollback_physics_lua

Lua compiles again
[AUTO]: updating luabinding automatically
Merge pull request #6550 from CocosRobot/update_lua_bindings_1398993078

[AUTO]: updating luabinding automatically