Implemented Split cards, not yet finished. Fuse does not work. Comparation for e.g. converterted mana (708.6a) does also not work correctly.

Mage/src/mage/game/stack/Spell.java

@@ -337,6 +337,11 @@ public class Spell<T extends Spell<T>> implements StackObject, Card {
         return null;
     }
 
+    @Override
+    public boolean isSplitCard() {
+        return false;
+    }
+
     @Override
     public boolean canTransform() {
         return false;