kr/s3 — pull request #29 by matope (2014-12-04 13:24:50+00:00)
Title: Signed query

Hi.
I'd like to add Signed Query feature to your nice package.
But PR #11 work looks left undone. So I've finish @mfine 's work and added tests.
In my laptop, this signed query works fine with s3.amazonaws.com.
Could you please review this PR?

Thank you.