Adding #ifdef guard to WProgram.h to prevent multiple #includes.

Removing Print class inheritance from Firmata since it's not clear that it can be implemented in a way that's compatible with the Firmata protocol and the Print class interface.

cores/arduino/WProgram.h

@@ -1,3 +1,6 @@
+#ifndef WProgram_h
+#define WProgram_h
+
 #include <stdlib.h>
 #include <string.h>
 #include <math.h>
@@ -17,3 +20,5 @@ long random(long, long);
 void randomSeed(unsigned int);
 long map(long, long, long, long, long);
 #endif
+
+#endif

libraries/Firmata/Firmata.h

@@ -67,7 +67,7 @@ extern "C" {
 
 
 // TODO make it a subclass of HardwareSerial
-class FirmataClass : public Print
+class FirmataClass
 {
 public:
 	FirmataClass();