T.T v2
Merge branch 'master' of https://github.com/harryzhanghr/jump21

Conflicts:

game.xcodeproj/project.xcworkspace/xcuserdata/YiChen.xcuserdatad/UserInt
erfaceState.xcuserstate

game.xcodeproj/xcuserdata/YiChen.xcuserdatad/xcdebugger/Breakpoints_v2.x
cbkptlist
	game/Base.lproj/Main.storyboard
	game/MutableBoard.swift
	game/Square.swift
	game/ViewController.swift