Implement import profile picture from Gravatar
Summary: Add a field where you can put the gravatar email address to pull an image for the profile picture from
Test Plan: Tried uploading a file, replacing with default, and various combinations and they all still work.
Reviewers: epriestley
Reviewed By: epriestley
CC: aran, Korvin
Maniphest Tasks: T2105
Differential Revision: https://secure.phabricator.com/D4809