Find a way to get email md5 for avatar

[chaws]

On colab/accounts/templatetags/gravatar.py:
try:
email = EmailAddress.objects.get(address=email)
except EmailAddress.DoesNotExist:
pass

email_md5 = getattr(email, 'md5', 'anonymous')

it's using super_archives to generate md5 and get gravatar image, let's try to find a way of doing so with plugin