Change to email voting procedures

[Mark Doliner]

On Wed, Dec 4, 2013 at 4:10 PM, Luke Schierer <lschiere at pidgin.im> wrote:
> If you want to shorten the process, I could agree to a 2 or 3 day waiting period followed by a voting window.

Seems reasonable. How about this?
1. The voting period opens at least 3 days after the vote is proposed.
2. The voting period closes 7 days after it opens.
3. The vote will be considered approved or rejected immediately upon
receiving a majority of votes.