There's now a Collision component that determines collision if its set. Closes #72.

components.cpp

@@ -29,6 +29,7 @@ namespace components {
       components::enroll<Sprite>(MAP);
       components::enroll<Animation>(MAP);
       components::enroll<Sound>(MAP);
+      components::enroll<Collision>(MAP);
       MAP_configured = true;
     }
   }