Allow user to choose their own profile image

As now the only choice you have is to use gravatar, which for a number of reasons (not wanting to use a single profile pic for x sites, etc.) may not be the best choice.

So an idea would be to allow users to uplod their own profile pic if they want so.

No files, tests, or entry points are named. Start by tracing where the current Gravatar profile image is selected and rendered, then identify the existing user and image-storage paths. Done means users can upload and select a profile image instead of using Gravatar, with the supported behavior and validation defined.

Written by the indexing model from the issue text.