* optimized card loading. There was some redundant code that wasn't necessary.

* getCardByName seemed to have a initialization error if you tried to use it before the entire game loaded.  The cache would
throw an exception if you tried to use find and it was empty.  I put a guard around it to avoid this issue.

* refactored Zeth's "toggledifficuly" feature to be stored in meta data.  http://code.google.com/p/wagic/source/detail?r=3106
 -- This is slightly modified as it forces a 1 for 1 swap of cards that are specified.
    from the example given this is how it seemed to be used anyways.
 -- since all the information is stored in the meta data, there's no need to alter the deck's
    definition.

projects/mtg/src/MTGGameZones.cpp

@@ -1,5 +1,7 @@
 #include "PrecompiledHeader.h"
 
+#include "DeckManager.h"
+#include "DeckMetaData.h"
 #include "MTGGameZones.h"
 #include "Player.h"
 #include "GameOptions.h"
@@ -43,10 +45,20 @@ MTGPlayerCards::MTGPlayerCards(MTGDeck * deck)
 void MTGPlayerCards::initDeck(MTGDeck * deck)
 {
     resetLibrary();
+    bool isAI = deck->getFilename().find("baka") != string::npos;
+    DeckMetaData *deckMeta = DeckManager::GetInstance()->getDeckMetaDataById( deck->meta_id, isAI);
+    map<int,int> alternatesMap = deckMeta->getAlternateMappings();
+    bool useAlternates = deckMeta->getVictoryPercentage() >= 65;
     map<int, int>::iterator it;
     for (it = deck->cards.begin(); it != deck->cards.end(); it++)
     {
-        MTGCard * card = deck->getCardById(it->first);
+        int cardId = it->first;
+        if (useAlternates && isAI)
+        {
+            if ( alternatesMap.find( cardId ) != alternatesMap.end() )
+                cardId = alternatesMap[ cardId ];
+        }
+        MTGCard * card = deck->getCardById(cardId);
         if (card)
         {
             for (int i = 0; i < it->second; i++)