Fix static files handling
Support collapse classes in admin. Closes #943.
Minor improvements for vanilla Django admin (eg no grappelli).
Refactor the live-editing toolbar: style tweaks, default toolbar to closed, logout form now a link that uses mezzanine.accounts logout if present (which shows a logout message).
Add some HTML5 tags to RICHTEXT_ALLOWED_TAGS

Hi,

This patch adds the following tags to RICHTEXT_ALLOWED_TAGS:

* article
* aside
* figure
* caption
* header
* footer
* nav
* section

... all of which are becoming increasingly common, and should all be safe to allow.

Thanks!
pep8 fix
Added guddina.com to sites in README.