Adding Selector Button Files
committed no changes
added setButtons function
Merge branch 'PhilSelectorButtons' into jason

Conflicts:
	LinEqGame/LinEqGame.xcodeproj/project.pbxproj
	LinEqGame/LinEqGame.xcodeproj/project.xcworkspace/xcshareddata/LinEqGame.xccheckout
	LinEqGame/LinEqGame.xcodeproj/project.xcworkspace/xcuserdata/pliao.xcuserdatad/UserInterfaceState.xcuserstate
	LinEqGame/LinEqGame/GridScene.h
	LinEqGame/LinEqGame/MyScene.m
	LinEqGame/LinEqGame/Selectors/Selector.h
	LinEqGame/LinEqGame/Selectors/Selector.m
Integration with selector buttons. Added fire button.