Actual 2x avatar, new profile picture options
Summary: Provides a real 2x avatar and offers new built in images for profile pictures.
Test Plan: reload profile, see sharper image, pick eevee, see eevee
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D14668
