Made it so that if Activatable Shield and Passive Shield are both equipped, Activatable Shield cannot be activated when Passive Shield is still active in ShieldCollection.lua.  Got rid of a bunch of white space in Hater_Arc.lua.  Renamed stuff for more clarity in GunpodCollection.lua.  Removed an unused variable in PassiveShield.lua.  Fixed the bug where Activatable Shield's sprite did not show up as well as cleaned up some variables in ActivatableShield.lua.