Nien added to the scene1

- Nien added to scene1, instead of the capsule
- Nien plays animation when reached the bottom of the scene
Improved following cat's camera. Added ghost trick activation (for very short time), and number of use limitation. Fixed bounding distance to be smaller than the actual half width/height of LevelManager. Changed movement to be based on acceleration not force.
Merge branch 'master' of github.com:haxpor/LD27
Merge commit 'd9077f5cff4dd51d214365b3c72e0f5e175eb56a'

Conflicts:
	unityproj/Assets/scenes/scene_game_world1.unity

Added nine cat into TriggerTouchTheGround script as a public variable and use that instead of using GameObject.Find().