Merge pull request #9 from dastergon/master

correct oasth's hyperlink
Cleanup the nanoc installation, add vincent as speaker
Add Michal to the speaker section
Make the speakers a carousel, update bootstrap
Bring back the slogans from the main slider
Don't show the speaker carousel on mobile, add Alberto and Miguel as speakers
Recompress speaker images, add an overview to the mobile view
Add two more sponsors: it.auth and cisco.