commit
tftp get_file
Merge branch 'master' of github.com:fusiqing/snail

Conflicts:
	keycode/key.c
	socket/broadcast/broadcast_client.c
	socket/broadcast/broadcast_server.c
	socket/broadcast/client
	socket/broadcast/makefile
	socket/broadcast/server
	socket/filecpy/Makefile
	socket/tcp/makefile
	socket/tftp/a.out
	socket/tftp/tftp_client.c
	socket/udp/client
	socket/udp/server