Doc, vagrant file updated
Resolves WEB-31: Basic SEO
Content Sites.xml sync (rel. WEB-56, WEB-57)
CSS: small improvements / fixes (rel. WEB-57)
Google Tag Manager (instead of Google Analytics) + New Relic snippet

Rel. WEB-54, WEB-65
WEB-71: Nginx vhost updated so it handles redirects from old domain and shorthand aliases to Atlasssian