Feature #5090: [Documentation] Add some direct links on doc.arvados.org to the most useful redmine pages
Review branch 5090-doc-to-homepage
Changed navbars, homepage, to let /doc/index.html function as homepage. Specifically: homepage title is "Arvados", top navbar links to "Developer Site" instead of arvados.org, homepage "license" footer text appears on right side to even out the two columns, various links added.
I put 5092 instead of 5090 by accident in the branch name and am not sure how to fix that.