added limiting of x to a color to fix Consume Spirit from being able to use any color..

{x:black}
{x:color}

creating a snapshot of a card instance in garbage for stored cards, the issue with previous version was it was using base model value instead of what the storedcard was actually at the time it was in battlefield. example, animal boneyard test was coming up 1 toughness short becuase the creature storedcard pointed to was sent to graveyard for the sacrifice. 

changed myStored TargetChooser to use storedSourceCard instead, as this is supposed to point to the actual card and not a snapshot.

projects/mtg/src/TargetChooser.cpp

@@ -673,7 +673,7 @@ TargetChooser * TargetChooserFactory::createTargetChooser(string s, MTGCardInsta
                 }
                 else if (typeName.compare("mystored") == 0)
                 {
-                    return NEW CardTargetChooser(observer, card->storedCard, card, zones, nbzones);
+                    return NEW CardTargetChooser(observer, card->storedSourceCard, card, zones, nbzones);
                 }
                 else
                 {