Implement interface to Rietveld.

This is a simple python interface based on Rietveld's HTTP interface, which is
being accessed via OAuth2 tokens generated for a service account authenticated
via an RSA key.

R=agable@chromium.org

Review URL: https://codereview.chromium.org/20495003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/reviewbot@215841 0039d316-1c4b-4281-b951-d872f2087c98
4 files changed