Merge pull request #36 from Oneway102/develop

Add a dialog the slide to failed and error screenshots.
Merge pull request #37 from Oneway102/develop

 add icon indicators for job status.
update job structure in zk_node
fix idle status error
Merge pull request #38 from Oneway102/develop

show duration instead of end time for jobs.
change hubot output format
Merge branch 'feature/ws-register-server' into develop
Merge branch 'develop' of github.com:xiaocong/remote-task-web-app into develop
add error handler of stream pipe
fix bug in case of error
add page param in task result api
update readme
add pagination for test result.