new sponsor bol.com and new logo layerthree
Merge pull request #748 from bridgetkromhout/master

Venue and dates for Minneapolis
Merge pull request #749 from drozer/master

new sponsor bol.com and new logo layerthree
separator is , not .
Add all the talks

a bunch of people's proposals
Merge pull request #750 from littleidea/pitt

Add all the talks
Added host sponsor logo and link.