remove "show my public profile" link from dashboard
create latest_events route
allow to set datetime format in format_date and format_time

This is especially usefull with the generic formats 'long',
'medium' and 'short'
use date_tag instaed of building time tag manually
use analog headings to overview
separate sections by hr
rm css rules
mv top_actions to utility
add "create new proposal" morelink in header
use Uri.js in adhocracy.overlay.rebindCameFrom

This
* simplifies code and
* allows to replace the came_from parameter if it already exists instead
of stupidly appending.
Do dynamic patch_camefrom only if this doesn't lead to 403 (fixes #631)
Refactor login_redirect_url and friends

Simplify code and make sure URLs which take instance into account are
created. See discussion in #631.
Allow request.params in MockRequest

This fixes test_url after the parent commit.
i18n: extract new messages
i18n: New german translations
Merge pull request #638 from carschroeder/new-german-translations-18nov

New german translations
redirect to latest_events on profile page

this makes it easy to change default profile view
change default profile view to about
use format=None with user.show for nicer urls
urge users to fill in their bio