Get a card's color from its abilities if it has no cost (i.e. special lands)

mtg.py

@@ -184,6 +184,12 @@ class Card:
         self.is_tapped = False
         self.abilities = []
 
+        if not self.colors:
+            # Try to determine the card's color based on its abilities. Not ideal, but maybe it'll help for now
+            for line in self.text:
+                for m in [ManaCost(c) for c in re.findall('{(\d*[WURGB]*)}',line)]:
+                    self.colors.extend([color for color, c in m.mana.mana.iteritems() if c > 0 and color not in self.colors])
+
         self.owner = owner
         self.zone = None