Update to KO 3.0.0 RC
Fix box-sizing in styles.css for Firefox
Merge branch 'gh-pages' into gh-pages-3.0.0
Update references to KO 3.0.0 (even though the final build isn't in place yet)
Amend download markup so we have a place for "release notes" links and can have either one or two downloads on the homepage and downloads page
Add v3.0.0 upgrade notes page