Auto-approval flow

[brumasribera]

Allow users to be approved after uploading 3 resources.

Send them emails after each upload to keep them on track and motivated.

• [x] Users automatically become publisher after 3 resources uploaded

• [x] Emails

  • [x] Welcome email - improve, mention approval requirements
  • [x] 1st contribution, only 2 left!
  • [x] 2nd contribution, only 1 left!
  • [x] Congratulations - You are now a Publisher on MoodleNet

Check @annakrassa design proposal