#119: ISO 8601 syntax for suite.rc interval options
passes existing tests
adjust output format
update isodatetime
#119: dump intervals in ISO 8601 form
#119: update vs feature branch
#119: fix restart-waiting test
remove redundant changes
update isodatetime
tidy and improve test docs
#119: implement feedback
restore block to original
Merge branch '119.iso8601-cycling' of github.com:cylc/cylc into iso.suite-rc-intervals
Merge pull request #1007 from benfitzpatrick/iso.suite-rc-intervals

#119: accept suite.rc interval configuration in ISO 8601 formats