Feature: App (optionally) handles vote open/close/reminder email

[geoelectric]

New feature:

Add an option to put an email (presumably a mailing list) address in when the vote is created, along with a custom message.

The app announces that the vote is opened, gives a N-before closing day reminder that the vote will close, and sends out the message when the vote is closed. The custom message would be appended, and could be used to give context to the vote or for any other purpose.