Partially implement separate blocks

src/Dodge/Default/Wall.hs

@@ -22,13 +22,12 @@ defaultBlock = Block
     , _wlColor = greyN 0.5
     , _wlSeen = False
     , _blIDs = []
-    , _blHP = 5
     , _wlIsSeeThrough = False
     , _blVisible = True
     , _blShadows = []
-    , _blDegrades = [20,20]
     , _wlDraw = True
     , _wlRotateTo = True
+    , _wlBlockID = 0
     }
 
 {- Indestructible see-through wall.  -}