Retheme header and home page

Update theme to look more like the origin community site. This
commit updates the logo, the basic body theming, the navbar theming
and the index page.

Also included is a redesign of the launch buttons, on the home page
only.
Retheme static content pages
Retheme search page

Adds optional query param to search form partial, to maintain
continuity. Also altered result list title to use query.

Re-works result list layout and theming.
Merge branch 'master' of https://github.com/openshift/oo-index
Merge pull request #65 from EmilyDirsh/master

New theming to fit in with community site