Merge pull request #18 from mklose/master

typo : 'Code Retreat' -> 'Coderetreat'
Write a bit more about the conference format
Merge pull request #19 from wosc/master

Flesh out conference format details
Replace existing sponsoring page with version from Andreas ans Nicole
Put p.s. text in footer
Sponsoring print tweaks
Even more sponsoring print tweaks
Use German-speaking... instead of German...
Insert registration paragraph
Show current sponsors
Rework footer structure
Use softwerkskammer.org instead of softwerkskammer.de
Use CDN versions of JS and Bootstrap CSS
Start new design for 2014. Definitely too much changes for 1 commit.
Add link to register button
Use Bootstrap3 grid on index.html
Clicking on Website Title in navbar should also link back to home
Change button text in jumbotron
Use 'SoCraTes 2014' as prefix in all page titles
removed unnecessary prod setup steps