manually enable depth test in test case TMXIsoVertexZ
closed #4786, Show tip message when python is not compatible.
Merge pull request #6276 from dabingnn/develop_fix_depth_in_IOSvertexZ

manually enable depth test in test case TMXIsoVertexZ
Merge pull request #6277 from natural-law/issue4786

Show tip message when python is not compatible.
Merge pull request #14 from cocos2d/develop

Sync Cocos2d-x