rose suite-clean: new command.
rose suite-clean: more documentation.
rose suite-clean: fix checking for running suite.
Merge branch 'master' into 548.rose-suite-clean
Merge pull request #567 from matthewrmshin/548.rose-suite-clean

rose suite-clean: new command
Closes #548
Run through tidy
Merge pull request #570 from arjclark/suites-html-fix

fix html bug in suites tutorial
Merge branch 'master' into gh-pages