* Add automated email ownership emails
This is task Michael does manually a lot. There are a lot of cases where
we need to validate that an individual has access to the email address
associated with their DEV account. This automates a singificant portion
of that, and hopefully we can use it in a lot of places.
* Use Devise registry to list available providers
* Cleanups following Devise+Omniauth docs
* More cleanups
* Use helpers
* More cleanups
* Oops, forgot to remove these specs
* Add Authentication providers
* Making strides on refactoring
* New usr from Twitter
* Existing Twitter user
* Existing user Github
* Test skip_confirmation!
* Refactor a bit and add simplecov groups
* Test user already logged in
* Rename to Authentication::Authenticator
* Refactor to a common class
* Add existing user test for twitter login
* Refactor global handler
* Fix spec and comment Twitter provider
* Update comments and strategy TODO
* Move providers loading code to Authentication::Providers
* add SubclassResponsibility error
* Use delegation
* No longer create identity in User factory
* Create view specs for users/edit.html.erb
* Update broken specs
* Make identities transient an explicit array
