Added tests for `sum` templatetag
Released v1.61.1
added session dict to view mixins
Update pagination.html
Added django_settings.py with IGNORABLE_404_URLS
Fixed regex for broken link emails
added 'cleanup_mailer_messagelog' management command
released v1.61.5
Added FilterIgnorable404URLs logging filter / Released v1.62
Fixed bug in logging filter
Released v1.62.1
Removed referrer check from logging filter - shit doesn't seem to work
Released v1.62.2
Added AddCurrentUser logging filter
Released 1.62.3
Added callback argument to getModalB3
Released v1.63.0
added IGNORABLE_404_USER_AGENTS setting to be used with FilterIgnorable404URLs logging filter

Also: removed all raven related stuff. We don't use sentry any more and we
don't want to maintain unused cruft in this repo.
Released v1.64
Added MJ12bot to ignorable spiders