rose install: improve example conf
rose training: rose edit demo
Merge pull request #591 from benfitzpatrick/training.demo_rose_edit

rose training: rose edit demo
Added rose suite-clean to In Depth Topics.
Added rose suite-clean to quick reference.
Merge pull request #592 from arjclark/doc-suite-clean

#588: Add rose suite-clean to slides and crib sheet
Merge pull request #589 from benfitzpatrick/rose-install.site-conf-example

rose install: improve example conf
Merge branch 'master' into gh-pages
Merge branch 'gh-pages' of github.com:metomi/rose into gh-pages