added site-wide wiki
split base.html into root.html and base.html to preserve navbar for non mezzanine pages
integrated wiki theme with the rest of the site and moved wiki search bar into the breadcrumb area.
updated requirements/project.txt
delete this commit
Revert "updated requirements/project.txt"

This reverts commit 64f0a77c37ef218b83e446c3093a719f3942ed52.
reverting base template
fixed template inheritance
updated requirements
merged upstream changes
working with upstream changes