Add Moip logo to indicate that we're using it.

Also, increase timeout so the user can read the texts without too much
hassle.
Fix layout width and increase zoom percentage.
Add link to the Designers' portfolio @ email.

Also, instead of invoking the relations on the mail template, we're
doing this on the Mailer class.
Create non_subscriber_method

To handle a list of anonymous subscribers and the non anonymous. Also,
use this on index page when listing subscribers (only list those who
are non anonymous).
Increase readability of the #thanks page.