consistent read option

[greenail]

Any chance you can implement the new consistent read option in the AWS gem?

http://github.com/appoxy/aws/commit/64058bd3937885fd94ba6aff4b0b110f2a4a13e2

[danmayer]

I have been meaning to take a look at this. I will try to look at it in the next week or so. We would also happily take contributions.