t:rose-suite-clean: tests.

Test cleaning while the suite is stopped, interactive mode.
Test cleaning while the suite is running.
t:rose-suite-clean: fix typo.
Merge pull request #780 from matthewrmshin/t.rose-suite-clean

t: rose-suite-clean: test battery
Fixed incorrect html nesting.
Merge pull request #781 from arjclark/clock-tut-correct

tutorials: clock-triggered: Fixed incorrect html nesting.
Merge branch 'master' of github.com:metomi/rose into metomi-gh-pages