Removed RGSS2 compatibility, condensed BitmapCache into RPG::Cache and made it work

Data/Scripts/001_Technical/001_MKXP_Compatibility.rb

@@ -1,4 +1,6 @@
 $VERBOSE = nil
+Font.default_shadow = false if Font.respond_to?(:default_shadow)
+Graphics.frame_rate = 40
 
 def pbSetWindowText(string)
   System.set_window_title(string || System.game_title)
@@ -25,4 +27,4 @@ def pbSetResizeFactor(factor)
     Graphics.scale = (factor + 1) * 0.5
     Graphics.center
   end
-end
+end