Merge branch 'feature-email-when-vote-starts' into 'master'

management/forms.py

management/management/commands/process_reminders.py

management/static/management/css/style.css

management/templates/management/add_election.html

management/templates/management/add_session.html

management/templates/management/election.html

management/templates/management/index.html

management/templates/management/session.html

management/views.py

static/img/example.png

vote/management/commands/reset_voter.py

vote/migrations/0017_election_send_emails_on_start.py

vote/migrations/0018_auto_20201025_2159.py

vote/migrations/0019_auto_20201030_1913.py

vote/migrations/0020_election_remind_text_sent.py

vote/models.py

vote/templates/vote/mails/invitation.j2

vote/templates/vote/mails/start.j2