vertical nav: separate groups slightly from pages via css.
events: another attempt to fix an issue where events#show raises `ActiveRecord::RecordNotFound` just after creation.
events: fixing the event order of the public feed.

trello: https://trello.com/c/cOa9EpLf/677-veranstaltungen
vertical nav: show pages above groups.
events: do not use webcal:// for windows and android.

Apparently, they don’t support it.

http://stackoverflow.com/questions/23091666/webcal-support-on-android-no
t-working-is-there-a-supported-calendar-feed-al