Remote job-submission, polling and deletion commands for SGE.
Merge pull request #614 from aosprey/sge-job-poll-and-kill-etc

Remote job-submission, polling and deletion commands for SGE.
cylc/cylc#615: fix hold state persistence after reload
Merge pull request #617 from benfitzpatrick/615.gcylc-hold-reload-fix

#615: fix hold state persistence after reload
Merge branch 'master' into submit-retry-task-state