Plone add-ons boilerplate.
A dumb and basic email manager.

- Filled with some design compromises, like not allowing a email address
  to be assigned to multiple accounts before that's verified, but none
  of these details are in the design scope, aside from something basic
  to show that this email address is associated with this login name on
  a first come first serve basis.
- Of course, other security details can be filled in later in the user
  forms that would interface with this object.

Progress towards tracker item 3762