Adding missing include in ZipUtils.h.
Update create_project.py

'Sample 1' way is not okay. If not input language, script doesn't generate project. (Must input language, but 'Sample 1' way said that you don't need to input language.)
Merge pull request #2939 from growingdever/patch-3

Update create_project.py
Merge branch 'develop' of z:/Project/cocos2d-x into develop
[WIN32] NULL --> nullptr for CCLayer.cpp.
[WIN32] class Action : public Object, public Clonable  --> class Action : public Clonable, public Object