prepare to adjust directory.

examples/client/main.cpp

@@ -1,5 +1,5 @@
 #include <iostream>
-#include <rpc_client.hpp>
+#include <rest_rpc.hpp>
 #include <chrono>
 #include <fstream>
 #include "codec.h"

examples/server/main.cpp

@@ -1,4 +1,4 @@
-#include <rpc_server.h>
+#include <rest_rpc.hpp>
 using namespace rest_rpc;
 using namespace rpc_service;
 #include <fstream>