Add ref for user feedback to flask
Add ref for user feedback to flask

johansteffner/raven-python,akalipetis/raven-python,johansteffner/raven-python,getsentry/raven-python,akalipetis/raven-python,johansteffner/raven-python,akalipetis/raven-python,getsentry/raven-python,getsentry/raven-python