Do not show the email address publicly.
Indicate this is an anonymous feedback system.
General improvements

- Add comments to each function.
- Log to the console the reason why it has failed to listen.
- Don't go directly to "thankyou" if there was a problem sending the
  mail.
Format date in a more human-readable form.
Formatting improvements.

- We are using a predefined layout for the time/date.
- Other fixes.
Merge pull request #2 from octete/jesus/improvements

Improvements for feedomatic