Create signal that will be sent when a user successfully recovers his password
Send a signal when PasswordResetForm is valid
Document the new signal
Update signals.py
Update user_recovers_password signal, sender is the user
Change user_recovers_password signal to a more conventional form

In Django's pre_save or post_save signals the sender is the model
class.
Merge pull request #9 from hso/master

Send a signal when password recovered