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 'feature/modeltranslation-integration' into develop
Merge branch 'master' into feature/modeltranslation-integration

Conflicts:
	mezzanine/core/models.py
Merge branch 'feature/modeltranslation-integration' into develop