Use isodatetime-2014.08.0-4-ged54df8
rose documentation: fixes/enhancements for suite tutorials
Cylc -> cylc
Update CHANGES.md
Merge pull request #1376 from matthewrmshin/isodatetime-2014.08.0-4-ged54df8

Use isodatetime-2014.08.0-4-ged54df8
address feedback
Merge pull request #1377 from benfitzpatrick/doc.tweaks

rose documentation: fixes/enhancements for suite tutorials
Merge remote branch 'upstream/master'
rose host-select: improve performance

Don't SSH all hosts if ranking method is random and there is no
thresholds to consider. Shuffle host list, and return 1st available
host.