Planning events are never shown on index page.

Currently, on index page `main_event` has always status 'active'. So planning event and corresponding subscription form are never shown on index page.

Check it out.
models.py:

        class EventQuerySet(models.query.QuerySet):
            def upcoming(self):
                try:
                    return self.filter(status=Event.STATUS.active).latest()
                except Event.DoesNotExist:
                    return None

views.py:

        context.update({
            'main_event': Event.objects.upcoming(),
        })

index.html:

        {% if main_event %}
        ...
                    {% if main_event.status == 'planning' %}
                        {% include 'blocks/message.html' with event=main_event %}
                        {% include 'blocks/subscription.html' %}
        ...
                    {% endif %}
        ...
        {% endif %}