Add ccRandom.h
CCRANDOM macro use ccRandom
Fix typo
fix getEngine
Fix xcode warning that cause `getEngine` inline expansion
Merge branch 'ccRandom' of https://github.com/gin0606/cocos2d-x into ccRandom

Conflicts:
	build/cocos2d_libs.xcodeproj/project.pbxproj
fix windows & win8 & wp8 compile error
Merge pull request #7827 from andyque/ccRandom

add c++11 random library support