show openid-login only if enabled (default)
Welcome mechanism to login users (hhucn/adhocracy.hhu_theme#169)
"welcome" feature: Add password setting dialog (hhucn/adhocracy.hhu_theme#169)
Enable welcome in hhu config
Nicer default if welcome auth fails
Better error message if password is too short
Send passwort change request in background
Default enable_welcome to off
Add option to monitor how much time a user spends on a page

An option 'adhocracy.monitor_page_time_interval' is introduced. If
set to a positive number, background requests are send to the stats
controller to monitor how long a page stays opened in the browser.
It is also included whether the window/tab is currently focused.
The value of the property determines the time between the completion of
the previous background request and the start of the next one.

This feature is required for hhucn/adhocracy.hhu_theme#167.
avoid variable name collision
Use normal variable for window active status; do not add value to DOM
OpenID login is disabled if "openid" is not part of adhocracy.login_type
Merge branch 'develop' into openid-behavior
Merge branch 'develop' into welcome

Conflicts:
	buildouts/hhu.cfg
	src/adhocracy/static/stylesheets/screen/content.css
pep8 beautification
Bump migration version number
Used function from authentication.py and changed error handling.
i18n: extract new messages
Merge pull request #290 from carschroeder/openid-behavior

Openid behavior
Merge pull request #285 from wawe/feature-monitor-time-per-page

Monitor time a user spent on a page