Pulled out Server API into the NetServer base class, and a few minor changes to get the NetClient API to work well with the WiFly library

cores/arduino/NetClient.h

@@ -20,8 +20,6 @@ public:
   virtual void flush() = 0;
   virtual void stop() = 0;
   virtual uint8_t connected() = 0;
-  virtual uint8_t operator==(int) = 0;
-  virtual uint8_t operator!=(int) = 0;
   virtual operator bool() = 0;
 };
 

cores/arduino/NetServer.h

@@ -0,0 +1,11 @@
+#ifndef netserver_h
+#define netserver_h
+
+class NetClient;
+
+class NetServer {
+public:
+  virtual void begin() =0;
+};
+
+#endif