rosie: installation guide update and some tidy up.

A result of multiple feedbacks by @hjoliver.
Merge branch 'master' into rosie-tidy
Merge branch 'master' into rosie-tidy
Merge branch 'master' into rosie-tidy
Fix typos and more rose.conf examples.
t: rose rug-brief-tour: test rose slv.
Merge pull request #707 from matthewrmshin/rosie-tidy

rosie: installation guide update and some tidy up.
Merge branch 'master' into t.rug.slv
Update CHANGES.md
Merge pull request #711 from matthewrmshin/t.rug.slv

t: rose rug-brief-tour: test rose slv.