Merge pull request #5 from shalako/master

removed image size from spec
Correct 410 status code

RFC 2616 [lists](http://tools.ietf.org/html/rfc2616#section-10.4.11) it as `Gone`. `Not Found` is used by another code, so the current docs are ambiguous and confusing to the reader.
Merge pull request #6 from michaelklishin/patch-1

Correct 410 status code
added ids to example response
Merge remote-tracking branch 'upstream/master'