Add the date of the payment to the email sent to the admin

Hi Rasmus,

This pull request adds the date that the user tried to donate to the weekly email. It also fixes the issue that was printing "empty" lines.

While doing this, I have setup an automatic script to get my local environment in sync with the latest changes to the website, so I can now make sure that my changes are going to work fine. It's a real improvement!

Warm regards,
Ignacio