added basic card draw replacement,

auto=replacedraw choice damage:2

auto=replacedraw choice draw:2 noreplace

notice noreplace exempts the draw from sending a draw event. draw events and drawn events are seperate events.

added dredge and it's rules.

[card]
name=Dakmor Salvage
auto=tap
auto={t}:add{b}
dredge=dredge(2)
text=Dakmor Salvage enters the battlefield tapped. -- {T}: Add {B} to your mana pool. -- Dredge 2 (If you would draw a card, instead you may put exactly two cards from the top of your library into your graveyard. If you do, return this card from your graveyard to your hand. Otherwise, draw a card.)
type=Land
[/card]

projects/mtg/include/WEvent.h

@@ -12,6 +12,8 @@ class Targetable;
 class ManaPool;
 class AACounter;
 class Counters;
+class MTGAbility;
+class DrawAction;
 
 class WEvent {
 public:
@@ -221,7 +223,13 @@ struct WEventcardDraw : public WEvent {
 	int nb_cards;
 	virtual Targetable * getTarget(Player * player);
 };
-
+//event for a card draw ability resolving
+struct WEventDraw : public WEvent {
+    WEventDraw(Player * player,int nb_cards,MTGAbility * drawer);
+    Player * player;
+    int nb_cards;
+    MTGAbility * drawAbility;
+};
 //Event when a blocker is reordered
 //exchangeWith: exchange card's position with exchangeWith's position
 //attacker:both card and exchangeWith *should* be in attacker's "blockers" list.