[WIP] Start removing devise.
Begin writing sessions logic for omniauth.
Document User.find_or_create_From_chef.
Clean up white space.
Expand upon user sign in and sign out.

* this remove devise locale stuff okay
* it documents things okay
Get specs passing (yey)

Note: the way omniauth is being mocked out kind of lame so let's change that
yo dog remove devise copy paste methods

real talk this also changes the location_storage module methods to use path
instead of url
Remove devise attrs from user
Expand upon LocationStorage#store_location! docs.
Okay Rubocop. 凸ಠ益ಠ)凸
Move the User.find_or_create_from_oauth docs around.
Refactor OmniAuth mock in sign_in with a user.
Remove omniauth-twitter.
Change set_mock_auth to configure_mock_auth in FeatureHelper.