Added overlay for future fps and stats display

lib/map.rb

@@ -14,7 +14,6 @@ class IMICFPS
       @lights   = []
 
       @collision_manager = CollisionManager.new(map: self)
-      @renderer = window.renderer
       Publisher.new
     end
 
@@ -54,7 +53,7 @@ class IMICFPS
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) # clear the screen and the depth buffer
         gl_error?
 
-        @renderer.draw(camera, @lights, @entities)
+        window.renderer.draw(camera, @lights, @entities)
       end
     end