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/src/WEvent.cpp

@@ -91,6 +91,11 @@ WEventCardBlocked::WEventCardBlocked(MTGCardInstance * card,MTGCardInstance * op
 WEventcardDraw::WEventcardDraw(Player * player, int nb_cards) :
     player(player), nb_cards(nb_cards)
 {
+}
+
+    WEventDraw::WEventDraw(Player * player, int nb_cards,MTGAbility * cardDraw) ://happens at the call for drawfromlibrary
+player(player), nb_cards(nb_cards),drawAbility(cardDraw)
+{
 }
 
 WEventCardSacrifice::WEventCardSacrifice(MTGCardInstance * card, MTGCardInstance * after) :