Merge pull request #262 from mzero/overloaded-write

allow Print's overloaded write() calls to be used with Adafruit_GFX

Adafruit_GFX.h

@@ -170,6 +170,7 @@ public:
   /**********************************************************************/
   void cp437(boolean x = true) { _cp437 = x; }
 
+  using Print::write;
 #if ARDUINO >= 100
   virtual size_t write(uint8_t);
 #else