Next version:
6.1.0501 2018
1.Fix linux build error issue.
2.Fix PTZ issue.
3.Add Ubuntu 16.04 and Centos7 release package.
4.remove unused mediaserver log.
5.Fix some onvif search printer crash.

5.2.0305 2018
1.Opencv based face detection support.

5.1 0226 2018
1.Change vs2013 to vs2017
2.Add windows RTSP server support
3.Update gsoap to 2.8.61.

5.0 0210 2018
1.Add H265 support.