cyberdelia/heroku-go — pull request #2 by ejholmes (2014-07-10 07:08:43+00:00)
Title: Don't set basic auth if an Authorization header is already present.

This makes it possible to use this transport in combination with [goauth2](https://code.google.com/p/goauth2/source/browse/oauth/oauth.go). Previously `req.SetBasicAuth` would override the `Authorization` header set by the oauth2 transport.