added on_order handler to entities and components, added visibility map

lib/ai/ai_player.rb

@@ -0,0 +1,15 @@
+class IMICRTS
+  class AIPlayer < Player
+    def tick(tick_id)
+      super
+
+      think
+    end
+
+    def think
+      # build base
+      # construct army
+      # attack
+    end
+  end
+end