Moved "reset damage on creatures at cleanup phase" outside of the engine and made it an ability. This is mostly because I need this for the mod I'm working on, but I hope it can be used by others

projects/mtg/src/MTGCardInstance.cpp

@@ -468,11 +468,10 @@ int MTGCardInstance::initAttackersDefensers()
     return 1;
 }
 
-//Function to call to remove all damages, etc to a card (generally at the end of the turn)
+//Function to cleanup flags on a card (generally at the end of the turn)
 int MTGCardInstance::cleanup()
 {
     initAttackersDefensers();
-    life = toughness;
     GameObserver * game = GameObserver::GetInstance();
     if (!game || game->currentPlayer == controller())
     {