support generate APK by script in template project and unify help message for usage.
Merge pull request #4592 from Dhilan007/android_build_script

support generate APK by script in template project and unify help messag...
Compilation fix after this PR (https://github.com/cocos2d/cocos2d-x/pull/4583).
Merge pull request #4594 from dumganhar/remove-cccamera

Compilation fix after this PR (https://github.com/cocos2d/cocos2d-x/pull/4583).
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into NewEventDispatcher