edx/edx-platform — pull request #941 by ormsbee (2013-09-12 03:36:36+00:00)
Title: Software Secure message signing and callback

Implements message signing and the callback URL Software Secure will use to report back about the identity of our users.

@dianakhuang: I'm bringing this in now so it can be tested overnight, but please review this and make comments when you have time tomorrow.