Merge pull request #745 from extraordinaire/master

[ljubljana 2014] add iw as media sponsor
ActiveState sponsoring Austin
Atlassian and Boundary sponsoring Austin
new silver sponsor Nexenta
Merge pull request #746 from drozer/master

new silver sponsor Nexenta
[ljubljana 2014] replace Igor with Avishai
Merge pull request #747 from extraordinaire/patch-2

[ljubljana 2014] replace Igor with Avishai
Venue and dates.
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.
[ljubljana 2014] add evening event location
Merge pull request #751 from extraordinaire/patch-3

[ljubljana 2014] add evening event location
Merge pull request #752 from bridgetkromhout/master

Added host sponsor logo and link.
Add Xebia Labs Steel Sponsor

add metadata and logo
Merge pull request #753 from littleidea/pitt

Add Xebia Labs Steel Sponsor