add instance key to css classes
allow multiple values for same key in query in lib.url.build()

this is also how it is done in base_url()
escape event preview in event stream
add ajax format to instance activity

similar to /event/all
allow to set a data source on event carousel
update event priorities
update event priority UI
pep8
Merge pull request #804 from xi/feature-clean-up-notification-settings

clean up notification settings
allow to explicitly set overlay-${size}

This is already sometimes set using JavaScript.
It is used to apply custom CSS.
use overlay size small for event carousel and event streams
check if overlays exist before executing javascript on them

this prevents javascript errors
use overlay_size on some more controller actions
add badge edit/manager permissions
check for specific permissions rather than admin for badges
typo
lower default entry barrier for editing badges to moderators
added a function which sets a users email to verified
(fix whitespace)
add velruse service