#1008: more minimal start-up dependencies
Merge branch '119.iso8601-cycling' of github.com:cylc/cylc into 1008.start-up-back-comp-dep-tweak
Merge remote branch 'upstream/119.iso8601-cycling' into 1008.start-up-back-comp-dep-tweak
#1008: add graphing tests
#1008: add graph tests for cyclers suites
#1008: adjust tests for new start-up/async behaviour
#1008: remove debug statements
#1008: remove another debug statement
Merge pull request #1026 from benfitzpatrick/1008.start-up-back-comp-dep-tweak

#1008: more minimal start-up dependencies