Bug: Add HTTPConnection->size() and HTTPServer->size()

Need this for proper garbage collection.

src/http.h

@@ -14,6 +14,8 @@ public:
   static v8::Persistent<v8::FunctionTemplate> client_constructor_template;
   static v8::Persistent<v8::FunctionTemplate> server_constructor_template;
 
+  virtual size_t size (void) { return sizeof(HTTPConnection); };
+  
 protected:
   static v8::Handle<v8::Value> NewClient (const v8::Arguments& args);
   static v8::Handle<v8::Value> NewServer (const v8::Arguments& args);
@@ -41,6 +43,8 @@ public:
   static void Initialize (v8::Handle<v8::Object> target);
   static v8::Persistent<v8::FunctionTemplate> constructor_template;
 
+  virtual size_t size (void) { return sizeof(HTTPServer); };
+
 protected:
   static v8::Handle<v8::Value> New (const v8::Arguments& args);