Jeck - Card ID collisions, cache fixes, cache deleted pooling.

* mtgid now defaults to 0.
 * TextScroller will not update when empty.
 * Cache now moves WCachedResources we're finished with to a garbage pool for later use (to reduce memory fragmentation). 
 * Demo still crashes... but I'm thinking that has to do with fragmentation, not a leak?

projects/mtg/include/GameStateMenu.h

@@ -20,6 +20,7 @@ class GameStateMenu: public GameState, public JGuiListener
   JTexture * bgTexture;
   JTexture * movingWTexture;
   JQuad * mBg;
+  JQuad * mSplash;
   JQuad * mMovingW;
   float mCreditsYPos;
   int currentState;