change mac to '12-34-56-78-90-ab' format in deocde_data
change sleep time 5 to 60, and store recive time as datetime.now() to db
change heartBeatClient, send time today() instead of a constant value
add uploadTime.py for statictis the time of img file upload to ftp server. Average is 72 sec, max is 2423 sec(uesful data?)
Merge branch 'master' of https://github.com/ppppdm/mtcpsoft