Rename RegisterService to Bind and add is_regex parameter; indent public/protected/private by one space; refine rest example.

example/soap_calc_server/main.cc

@@ -24,8 +24,7 @@ int main(int argc, char* argv[]) {
   try {
     webcc::SoapServer server(port, workers);
 
-    server.RegisterService(std::make_shared<CalcService>(),
-                           "/calculator");
+    server.Bind(std::make_shared<CalcService>(), "/calculator");
 
     server.Run();