Allow blog feed title and description to be overridden.
Use callable description in atom rss feed.
Fix age display: use a blocktrans instead of {% trans 'ago' %}

In some languages, like french "ago" is a preposition, so doing
something like "{{ value }} {% trans 'ago' %}" will not work, we have to
use a blocktrans.
Properly escape comments in comment_filter template tag.
Bump grappelli/filebrowser versions.
Version bump to 1.4.6
Added tag 1.4.6 for changeset 94f1427035e1
Update auto generated CHANGELOG, requirements, settings docs.
mezzanine.accounts czech translation update
Added Petr Papoušek to AUTHORS.
Merge
Added new site to README.
Added the ACCOUNTS_NO_USERNAME setting, which will hide the username field from signup/update forms, but still generate a unique username for use in profile view slugs.
Allow querystring vars to be excluded from pagination links.
Missing migration on site perms. Closes #655.
Added support for setup.py test
Registered Displayable for translation, this (abstract) model is instantiated for sitemap generetion.
Merge branch 'master' into feature/modeltranslation-integration

Conflicts:
	mezzanine/core/models.py