Remove old Cilantro related templates and config files
Remove cilantro from INSTALLED_APPS and as a context processor
Add a base HTML template to extend(this used to come from Cilantro)
Extend the new base HTML template instead of the old Cilantro one
[REDO] Remove Cilantro related urls
[REDO] Remove references to UserPreferences from removed Cilantro app

We will need to recreate portions of this as the preferences were stored in the response data and referenced elsewhere.