The platform is by: http://bondidigital.com/

And the people who built it have done a lot of graphics heavy lifting in javascript in the past.

Ian Gilman i.playboy.com: https://twitter.com/iangilman/status/71255767684100097

firefox panorama: https://twitter.com/iangilman/status/60395010868264960

deep-zoom/seadragon: https://twitter.com/iangilman/status/22789135248920576

Ditto Aseem Kishore: http://aseemk.com/projects/