cross correlation on x86 done
0808
initMerge remote-tracking branch 'origin/signal' into signal
Merge remote-tracking branch 'origin/master' into upload

Conflicts:
	acoustic_modem.c
upload file
sync stamp added
atalk ready
sync_integrated.
Merge branch 'sync_after_play' into devel
Merge branch 'talk' into devel
show msg & help function
init modeswap
update the rs232 lib
cut the useless part
compile ok
not yet test it
implicit issue #define __GNU_SOURCE
seems that all compile warning message was solved
cleanup file system
msg -> msg_local
Merge remote-tracking branch 'origin/comparison' into devel
Merge remote-tracking branch 'origin/libserial' into devel
Merge remote-tracking branch 'origin/matlab' into devel

Conflicts:
	Makefile
	acoustic_modem.c