Optimized LiquidCrystal class

removed dependecies to arduino Print and String classes
spared 522 bytes of flash and 84bytes of ram

Firmware/SdFile.h

@@ -25,7 +25,7 @@
 
 #ifdef SDSUPPORT
 #include "SdBaseFile.h"
-#include <Print.h>
+//#include <Print.h>
 #ifndef SdFile_h
 #define SdFile_h
 //------------------------------------------------------------------------------
@@ -33,7 +33,7 @@
  * \class SdFile
  * \brief SdBaseFile with Print.
  */
-class SdFile : public SdBaseFile, public Print {
+class SdFile : public SdBaseFile/*, public Print*/ {
  public:
   SdFile() {}
   SdFile(const char* name, uint8_t oflag);