Initial SAV MkI (RepRap CloneWars board) integration.

Included support for BT dongle on AT90USB boards.
Added LCD Shift Register LCD control
Included support for RepRap Clone Wars project board (SAV MKI).

Marlin/Marlin.h

@@ -34,6 +34,10 @@
 # define analogInputToDigitalPin(p) ((p) + A0)
 #endif
 
+#ifdef AT90USB
+#include "HardwareSerial.h"
+#endif
+
 #include "MarlinSerial.h"
 
 #ifndef cbi
@@ -45,6 +49,15 @@
 
 #include "WString.h"
 
+#ifdef AT90USB
+   #ifdef BTENABLED
+         extern HardwareSerial bt;
+         #define MYSERIAL bt
+   #else
+         #define MYSERIAL Serial
+   #endif // BTENABLED
+#endif
+
 #ifdef AT90USB
   #define MYSERIAL Serial
 #else