Initial commit.
Second half command keys tutorial.
Fix html mistake in suicide triggers tutorial.
Added summary slide.
Corrected typos, improved spelling, style etc.
Tidy cleaned version.
Merge pull request #497 from arjclark/alternate-command

#495 Alternate command tutorial
Merge branch 'master' of github.com:metomi/rose into metomi-gh-pages
Fix typo in doc string.
Merge remote branch 'upstream/master'
Merge branch 'master' into gh-pages
Merge branch 'gh-pages' of github.com:metomi/rose into gh-pages