Remove werkzeug dependency
Re-add missing fields in migration scripts (Fixes hhucn/adhocracy.hhu_theme#162)
Remove yet another leftover RabbitMQ file
Convenience method to get multiple permissions
Convenience method telling whether a group fulfills any given permission
Allow change of from email and name in lib.mail.to_mail and friends
Implement news service (#164)

Main features:

* Add mass message controller, which allows users with the right
permissions to send emails to all members of selected instances.

* If users have chosen to receive messages from instance instance
administrators, they will receive them as email.

* Add Message and MessageRecipient models, which store mass messages and
to which these have been sent, in order to display them in a reworked
user dashboard at some point.

Helper features:

* Add permission checks for sending mass messages.
* Add user option: receive mass messages from administrators
* Add default noreply email configuration

Yet missing:

* Every mass message email should contain a link which deactivates
receiving mass messages via email.
Expose mass message feature in instance admin UI
Fix migration script
Merge pull request #255 from nidico/feature-remove-werkzeug-dependency

Remove werkzeug dependency
Hide defunct option in INSTALLATION.md
Do not use broken mirror (Closes #260)
typo
Switch to HTTP for now (temporarily, while we set up HTTPS)
Revert "Switch to HTTP for now (temporarily, while we set up HTTPS)"

This reverts commit fa1afe38c229e0bd55de9ab3bc8e8cbacbca0282.
Enable requestlog in hhu config
Simplify lamson documentation
Note that this never worked, as -e is not an option to a POSIX shell echo built-in, but only to /bin/echo
Do not use deprecated func_name property (see http://docs.python.org/3/reference/datamodel.html#index-33 )
Correct calls to guard in badge controller (Fixes #262)
We forgot to change those after 29d37c70ab
add the possibility to collect data about the behavior of users
while looking at proposals and their comments, a prerequisite to fixing
hhucn/adhocracy#115
 - introduced a 'stats' controller to be used to collect various usage
   statistics to be used by this feature as well as future extensions
   (e.g. hhucn/adhocracy#167)
 - added an option 'adhocracy.monitor_comment_behavior' to control
   whether stats about comments should be collected
 - added background requests that are triggered iff the option is set
   and a user either scrolls or opens 2nd-level comments; for data to be
   collected, 'adhocracy.requestlog_active' must be set to True