Adding back credits to Peter Ahé who were stripped by Photoshop.
Adding image metadata adding copyright to Google.
Updating schema.org event data so that it's imported nicely in G+.
Adding generated files from copyedit PR #1155
Adding 2 more option for images in G+ imports.
Merge pull request #1159 from nicolasgarnier/dartsummit-update

Dartsummit site update