New header banner without "in Deutschland".
Merge commit '2276a9245e843472f79bdc2d0947532a6d100341'
Merge pull request #241 from leider/master

new logos
Merge commit '81071d5905f5529e98d98b87ab36920af9cab18d'
Update for README
Merge pull request #242 from leider/master

Groups now have organizers
Merge pull request #243 from leider/master

now news in sidebar
Merge commit '672314e114c198682d2484afaa21d8e21f3fdbd0'
Hotfix: Announcement links in the lower right news area must be absolute.
Merge pull request #244 from NicoleRauch/master

Hotfix for section "Das Neueste"