first stab at email templates
adds the management command. a little scary.
adds an EMAIL_BACKEND setting, patches up the reminder templates, and finalizes the management command.
autoescapes the plain text email to avoid html entities, and improves spacing in the html template.
updates vote readme
fixes typo in readme
adds a dry-run option so that you can see who would actually get emails
Merge pull request #119 from haaksmash/feature/119-vote-email-reminders

Vote: send out reminder emails