Homestyx hydra

R1:664fe7ef730a

Add a User-Agent header to OAuth requests

Summary: GitHub now requires this: http://developer.github.com/changes/2013-04-24-user-agent-required/

Test Plan: Used GitHub auth to login.

Reviewers: btrahan, chad

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D5787
Repository: R1 hydra
Commit Date: Apr 26 2013