Import polling worker awaits confirmation

The import poller sends an email to the PA team with a confirmation and
cancel link.
Confirmation email for import

Email contains both confirmation and cancel links, linking to import
confirmation controller with given secret key.
Gives import a confirmation key module

Confirmable generates confirmation key and stores it in redis via the
Import's token. This will be used to verify whether or not the person
trying to confirm (and start) the import is authorised to do so.
Adds a verification method to the Import

Imports can verify confirmation keys by checking to see if the
given key matches the one stored in redis.
Adds authentication to the import confirmation

Import confirmation controllers verifies that the user has authorisation
to confirm/cancel the import via a secret key generated by the Import
and stored in redis.
Confirmation controller starts/cancels imports
Default to a fake email address for imports

Don't want to accidentally email a bunch of people for no reason
Adds some basic pages for import confirmation
Import confirmation routing is corrected

Uses correct naming and namespaces
Test to see if unauthorised users can delete confirm key
Merge pull request #133 from unepwcmc/import-confirmation

Import email confirmation