A requests adapter to automatically login to the Cambridge University Raven Login
Example usage:
import ravenclient
import requests
s = requests.Session()
s.mount(ravenclient.auth_url, ravenclient.HTTPAdapter('efw27', 'mypassword'))
r = s.get('http://www3.eng.cam.ac.uk/exams/results/2012/pt1a.html')
print r.text[:600]