Update NEW email template.

 The last one was a bit too technical and obscured with details about
 how dak works internally. This is a more clear project-centric template
 that explains the situation in terms the average contributor would
 understand.
Merge remote-tracking branch 'paultag/paultag/bugfix/new-package-template-fix' into merge

* paultag/paultag/bugfix/new-package-template-fix:
  Update NEW email template.