added retake button
Merge branch 'master' of https://github.com/lwang84/MHackberrithon1

Conflicts:
	MHackberrithon/MHackberrithon.xcodeproj/project.pbxproj
	MHackberrithon/MHackberrithon.xcodeproj/project.xcworkspace/xcuserdata/happyzone8.xcuserdatad/UserInterfaceState.xcuserstate
	MHackberrithon/MHackberrithon.xcodeproj/xcuserdata/happyzone8.xcuserdatad/xcdebugger/Breakpoints.xcbkptlist
	MHackberrithon/MHackberrithon/MHViewController.m