cylc task messaging: alter send message logging
Merge branch 'master' into cylc.task-message-send-succeeded-bugfix
Fix releasing a suite with non-cycling tasks
Merge pull request #842 from benfitzpatrick/cylc.task-message-send-succeeded-bugfix

cylc task logging: "Send message 1 of 7 succeeded" bugfix
Merge pull request #843 from benfitzpatrick/cylc.fix-release-suite-non-cycling

Fix releasing a suite with non-cycling tasks
Added a battery test for suite hold and release.
Updated change log for 5.4.7
Updated gh-pages copy.
Updated admin release script.
Fixed a typo in the change log.
Merge pull request #845 from hjoliver/test-suite-hold-release

Added a battery test for suite hold and release.
Merge remote branch 'upstream/master' into run_db.add_current_and_spawned