mloughran/signature — pull request #2 by markburns (2012-04-29 22:18:29+00:00)
Title: use OpenSSL instead of ruby-hmac gem

as per README at

https://github.com/topfunky/ruby-hmac

and referenced blog post at

http://blog.nathanielbibler.com/post/63031273/openssl-hmac-vs-ruby-hmac-benchmarks

it looks like it makes sense to remove the ruby-hmac dependency and use openssl