Add Adobe logo
Re-add Microsoft logo
Add Bloomberg logo
Add Conde Nast logo
Add Esri logo
Add Facebook logo
Add Mozilla logo
Add Olark logo
Add Twilio logo
Add Yammer logo
Add whitespace between sponsors graphic and content
Update Facebook blurb per POC
Add ExactTarget
Update NodeSource details
Merge pull request #4 from jsconf/issues/add_adobe_logo

Add Adobe logo and back-fill repeat sponsors from last year's site