Add tank furniture, stop autorotate when aiming

src/Dodge/LevelGen/Block.hs

@@ -122,6 +122,8 @@ addBlock (p:ps) hp col isSeeThrough degradability w
             , _blVisible = True
             , _blShadows = []
             , _blDegrades = degradability
+            , _wlDraw = True
+            , _wlRotateTo = True
             }
         ) is lns
     wallInZone wl