new file:   bin/client.c
	modified:   include/x_memory.h
	modified:   include/x_net.h
	modified:   include/x_plugin.h
	modified:   include/x_trace.h
	new file:   plugin/x_plugin_echo.c
	new file:   readme
	modified:   src/Makefile
	new file:   src/SMakefile
	modified:   src/x_io.c
	new file:   src/x_io.o
	modified:   src/x_memory.c
	new file:   src/x_memory.o
	modified:   src/x_net_select.c
	new file:   src/x_net_select.o
	new file:   src/x_plugin_echo.o
	modified:   src/xiang.c
	new file:   src/xiang.o