Restore 2011 Workshop documentation

[danbri]

See https://web.archive.org/web/20131018045946/http:/schemaorg.cloudapp.net/2011Workshop/

Thanks @mfhepp for the nudge.

[danbri]

The only non-PDF slides were from @benadida.
https://twitter.com/danbri/status/607949333904949248 ... I'm copying them all into repo.

[danbri]

Re-opening to note that http://blog.schema.org/2011/09/schemaorg-workshop-wrap-up.html should be updated accordingly (the page also needs boilerplate, and we ought to thank MS for hosting)

[danbri]

http://sdo-ganymede.appspot.com/docs/kickoff.html

[github-actions]

This issue is being tagged as Stale due to inactivity.