Add library selection between GLCD and char. LCD

Marlin/Marlin.pde

 #include "pins.h"
 
 #ifdef ULTRA_LCD
-#include <LiquidCrystal.h>
+	#ifdef DOGLCD
+		#include <U8glib.h> // library for graphics LCD by Oli Kraus (https://code.google.com/p/u8glib/)
+	#else
+		#include <LiquidCrystal.h> // library for character LCD
+	#endif
 #endif
 
 #if DIGIPOTSS_PIN > -1