"mailto:" is missing from generated mail Contact lines

[rugk]

I just dropped you a mail (but cannot find it anymore, so cannot copy it)… (If you still have it, copy it here)
Ah, it was the contact formula! If you still have that, feel free to copy it in here.

In any case, the issue is the spec mandates mailto: for mails, but your generator generates (thus) "non-compliant" Contact lines without that prefix.

[EdOverflow]

Should be fixed in #81. Thank you, @rugk. :)