start to refactoring
remove robot game fields
remove robot onAnimationComplete method and mv DebugCommand Class
refactor robot move method
add turn method to robot class
fix defineProperties bugs about GroupModel
refactor RobotWorld Class
replace _.compact to some method
change RobotWorld instance to Singleton
add ViewGroup Class, ViewSprite Class
refactor view.coffee and add event to robot
add pickup event to robot
refactor pickup & shot event processing
mv js files to js dir
refactor robot api
remove robot moveTest api
remove barrier system
reduce max hp of a robot
remove pickup tip and add event about robot