GroupCommandManager should not be a singleton, it should be managed by Renderer.
Add interface setCullingEnabled(), culling is disabled by default
setCullingEnabled set to public access
changed renderer->culling test case
LabelTTF:fixed display incorrect if create by FontDefinition.
change indention to space and remove comment code
change variable name.
Merge pull request #6272 from Dhilan007/develop

LabelTTF:fixed display incorrect if create by FontDefinition.
Merge pull request #6267 from dabingnn/develop_add_culling_enabled_option

Add interface setCullingEnabled(), culling is disabled by default
[ci skip]
Merge pull request #6257 from dumganhar/group-command-manager-not-singleton

GroupCommandManager should not be a singleton, it should be managed by Renderer.
[AUTO]: updating luabinding automatically
Merge pull request #6273 from CocosRobot/update_lua_bindings_1397458473

[AUTO]: updating luabinding automatically