Add "no spaces allowed" to username register hint
use 320x160 for tiles

fixup 7878e1dce8c4dd71e8b2aefe88307e8e869e1903
Rename caption "user groups" to "user group"
Don't show userbadges in profile sidebar if none and not admin
i18n: extract new messages
i18n: update all languages
i18n.de: fix typo
add html_to_plain_text
add moment.js
add lib.event.as_icon
allow to pass custom msg to lib.event.as_html
event carousel template
event/all.ajax route
event carousel javascript
event carousel CSS