Integration of TurnControl

TurnControl no longer exists. All of the (few) functions it contained
have now been integrated into the HVListener, and as HVListener is no
longer just our keylistener but also contains code for movement of mobs
and now turn control, it has been refactored to "Control". If you hate
the name, speak up. Otherwise, that's what it's called now.
"Deletion" of HVListener

Don't freak, as mentioned in the previous commit, the contents of
HVListener were simply refactored as the class "Control". Apparently it
takes GitHub two passes to realize that HVListener no longer exists.