mod time sync and print
add gprs upgrade function, ok now.
update project settings.
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master' into meter_usart1

Conflicts:
	Project/hdr70-r02/Inc/mysysdefs.h
	Project/hdr70-r02/Src/Drives/dev/gprs/gprs.c
	Project/hdr70-r02/Src/Drives/dev/gprs/gprs_protocol.c
	Project/hdr70-r02/Src/Drives/dev/lcd/screen.c
change http upgrade server dir.