weapon independency fixes

weapon independency fixes
Damage() function now checks that the target entity does not have a realowner which is another independent player before dealing damage and/or force to it
fireball's primary BFG no longer tries to target independent players
fireball's secondary "turrets" no longer try to target independent players
they also ignore frozen players as suggested by terence
electro's primary's explosion no longer explodes electro balls owned by other independent players
electro's primary's midair combo no longer explodes electro balls owned by other independent players
electro's comboexplosion no longer explodes electro balls owned by other independent players