Removed entity management from Game, refactored Map to MapLoader and added Map to manage world

lib/states/game_state.rb

@@ -1,16 +1,7 @@
 class IMICFPS
   class GameState < CyberarmEngine::GameState
     include CommonMethods
-    include EntityManager
-    include LightManager
 
     attr_reader :options
-    def initialize(options = {})
-      @delta_time = Gosu.milliseconds
-      @entities   = []
-      @lights     = []
-
-      super
-    end
   end
 end