==api description
NTween.to tween to value
NTween.from tween from value
NTween.fromTo tween from value to value
NTween.by tween to value with relative vars
NTween.set helper function to set value
NTween.delayedCall helper function to create delayed callback
NTween.Hash helper function to create var args
NTween.activatePlugins activate new plugin
NTween.killTweensOf kill tweens of one target
NTween.killTweensByHost kill all tweens of host gameObject