Update version to 1.6.0-0-rc1
Fix docs build tag usage
Merge branch 'development' into release-1.6
Update version to 1.6.0-0-rc2
Merge branch 'development' into release-1.6
Merge branch 'development' into release-1.6
Update to 1.6.0-0-rc3
Use v8 api request for jobs import #474
Don't throw error if local option json file is empty #467
Change empty json result text #467

* "no values to choose from"
Email notification subject for aborted job fixed #477
Fix handling of \r character #347
Improve context info for debug output
Don't collapse empty lines

* exec output should not collapse empty lines if the time, node, step
* columns are hidden
Extra JSCH output to debug level by default
version history pages should be named by the file name
Update version to 1.6.0-1-GA
Update release notes for 1.6.0