added miracle ability.

i choose to use other cost instead of creating a brand new cost type.

otherrestriction determines if the card is the miracle for the turn.

[card]
name=Devastation Tide
auto=all(*[-land]) moveto(ownerhand)
other={1}{u} name(Miracle)
otherrestriction=miracle
text=Return all nonland permanents to their owners' hands. -- Miracle {1}{U} (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)
mana={3}{U}{U}
type=Sorcery
[/card]

projects/mtg/src/MTGCardInstance.cpp

@@ -100,6 +100,7 @@ void MTGCardInstance::copy(MTGCardInstance * card)
     castMethod = castMethodBackUP;
     backupTargets = this->backupTargets;
     storedCard = oldStored;
+    miracle = false;
 }
 
 MTGCardInstance::~MTGCardInstance()
@@ -171,6 +172,7 @@ void MTGCardInstance::initMTGCI()
     storedCard = NULL;
     storedSourceCard = NULL;
     myPair = NULL;
+    miracle = false;
 
     for (int i = 0; i < ManaCost::MANA_PAID_WITH_SUSPEND +1; i++)
         alternateCostPaid[i] = 0;