Add efficiency statistic for performance tuning, and can be shut down.

Move packers and unpackers out of 'include' directory (now in 'ext' directory), they don't belong to st_asio_wrapper library.
Add pingpong test.
Add streaming unpacker to receive native data.
Support non-copyable msgs.
Make asio_server and test_client more appropriate for performance tunning.

compatible_edition/include/st_asio_wrapper_base.h

@@ -125,7 +125,7 @@ namespace st_asio_wrapper
 		using typename i_packer<MsgType>::msg_type;
 		using typename i_packer<MsgType>::msg_ctype;
 
-		virtual bool pack_msg(msg_type& msg, const char* const pstr[], const size_t len[], size_t num, bool native = false) {assert(false); return msg_type();}
+		virtual bool pack_msg(msg_type& msg, const char* const pstr[], const size_t len[], size_t num, bool native = false) {assert(false); return false;}
 	};
 
 	//unpacker concept

compatible_edition/test_client/test_client.cpp

@@ -35,6 +35,10 @@
 using namespace st_asio_wrapper;
 using namespace st_asio_wrapper::ext;
 
+#ifdef _MSC_VER
+#define atoll _atoi64
+#endif
+
 #define QUIT_COMMAND	"quit"
 #define RESTART_COMMAND	"restart"
 #define LIST_ALL_CLIENT	"list_all_client"