Add registration button to conference page header
Add 'agenda coming soon'
Use transparent bg partner images, adjust size
add new hotel links, the current ones are full
Reduce size of conf logo slightly
Reorder about section
Merge remote-tracking branch 'origin/master' into conference
Add TU Berlin link, link to community social pages
Remove some margin around the partners
Remove horizontal scroll bar, fix social icons bg on conf pages
Centre the footer nav
fix date for Nue release party
Use transparent bg partner images, adjust size
Remove some margin around the partners
Merge branch 'master' into conference

Conflicts:
	assets/css/conf.css
Merge pull request #246 from owncloud/conference

Conference page improvements