uid is now base64 encoded in password reset URLs/views. A backwards compatible
password_reset_confirm view/URL will allow password reset links generated before
this change to continue to work. This view will be removed in Django 1.7.
Thanks jonash for the initial patch and claudep for the review.
The auth doc was a single page which had grown unwieldy.
This refactor split and grouped the content into sub-topics.
Additional corrections and cleanups were made along the way.