#1267: add new ISO 8601 task-env syntax & tests
Merge branch 'master' into isodatetime.task-env
#1267: adapt rose prune functionality to ISO 8601.
update for isodatetime changes (more like 'date')
#1267: tweak iso tests
update doc
#1267: tidy documentation
rename tests and debug
#1267: implement style feedback
Merge pull request #1271 from benfitzpatrick/isodatetime.task-env

rose task env, rose prune: support new ISO 8601 cylc syntax