Merge pull request #44 from Oneway102/develop

add trace info for case results; modify screenshot update intervals.
get job exec info as soon as it started.
fix error in case the network disconnected with reg server.
Merge branch 'develop' of github.com:xiaocong/remote-task-web-app into develop
update site name
fix product build error
update the way user login; fix bug when showing active jobs.