Add Steel Sponsorship

add new layout for pitt
change event pages to use new layout
Merge pull request #684 from extraordinaire/master

[ljubljana 2014] add extra proposals
Merge pull request #685 from littleidea/pittsburgh

Add Steel Sponsorship
Adding Minneapolis 2014.
Merge pull request #686 from bridgetkromhout/master

Adding Minneapolis 2014.
[ljubljana 2014] add proposal from Karoly Kamaras