License Keys now number instead of boolean

The number associated with the variant is the number of license
keys which are to be distributed as part of the mail.

Change-Id: Idd1f339f7745266bd2a6574bf55ca93586768b14
Added a view test for my mailer.

Change-Id: Ifb0e066041e9f48aad1300c598eed9c5ac24dc04
Properly localize the e-mail.

Change-Id: Ic4503d46b269ab40f5812a55cce0a53156c3e25f