add getTimer (max, min) to leveling
Merge branches 'run-game' and 'run-game' of https://github.com/growingdever/threejs-small-framework into run-game

# By Namyun Kim
# Via Namyun Kim (1) and growingdever (1)
* 'run-game' of https://github.com/growingdever/threejs-small-framework:
  Enable fullscreen mode in FF/Chrome/IE

# By Namyun Kim
# Via Namyun Kim (1) and growingdever (1)
* 'run-game' of https://github.com/growingdever/threejs-small-framework:
  Enable fullscreen mode in FF/Chrome/IE