Support for gravatar #418
Description
Is your feature request related to a problem? Please describe
No.
Describe the solution you'd like
Add support to fetch the avatar from gravatar.
See: https://en.gravatar.com/site/implement/
Additional context
The avatar may be fetched from /api/v2/users/{user}/avatar which currently returns the internally stored gravatar. It should also be possible to fetch one from gravatar.