replace <div class="hr"><hr /></div> by <hr />
adopt stylesheets to use hr instead of .hr
replace <hr /> by css border in content_list elements
pep8
rm .hidden from _pager.scss as it is already defined in general/utilities
full css pager (no background-image required)
rm bootstrap_pager
Merge pull request #458 from xi/feature-remove-bootstrap-pager

remove bootstrap pager
rm `cursor: pointer` in comments
Speed up in debug mode by disabling always_scan

Disabling this option speeds up simple queries to adhocracy by a factor between 5 to 10 (that's with an SSD and ample RAM).
Since paster serve --reload automatically restarts the whole application anyways, this option has no effect for us.
This was found during hhucn/adhocracy.hhu_theme#401
Do not look for adhocracy module on every request

Previously, our translation mechanism went looking for the location of the adhocracy module (in order to later find the i18n file) on every request, causing about half of all per-request I/O calls (typically cached, but a context switch nontheless).
We can simply look the location in userspace entirely after reading it once.
This was found during hhucn/adhocracy.hhu_theme#401
Move use_feedback_instance configuration into adhocracy.config
Short-circuit feedback.is_configured

If use_feedback_instance is not set, we should not query the database.
Add a configuration to not check for the feedback instance on every request

Currently, we're sending a database query for every single rendering of adhocracy, just for the feedback button, and just to verify that the instance exists.
Add a configuration option adhocracy.feedback_check_instance that can be set to false in order to not check every single time.
See hhucn/adhocracy.hhu_theme#401 for context.
Add an option to use feedback without categories

If set, all feedback entries will be without a category.
In my tests, setting these two feedback options roughly halves loading time of the front page (for anonymous users).
See also hhucn/adhocracy.hhu_theme#401 .
Simplify feedback URL generation

We don't actually need the instance here, just the instance key.
hhucn/adhocracy.hhu_theme#401
Fix instance setting form flash messages

d6a598fd64232fe9933d1bc6d2ca068c48eb4e9a allowed flash messages to be
HTML by not escaping them.

However this broke flash messages instance settings, as they used
LazyStrings previously, which doesn't work with makos pipe filter.

Therefore we now convert the LazyString objects to unicode before
putting them in a flash message.
Translate shibboleth logout message
Fix typo
i18n: Update all translations