Cleaner code in EKGraph
Merge branch 'master' of github.com:AustinChou/EKAlgorithms

Conflicts:
	EKAlgorithmsApp/EKAlgorithmsApp.xcworkspace/xcuserdata/Yifei.xcuserdatad/UserInterfaceState.xcuserstate
	EKAlgorithmsApp/EKAlgorithmsApp.xcworkspace/xcuserdata/Yifei.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist
Merge pull request #74 from AustinChou/master

Cleaner code in EKGraph