followers tested.

when apply to a server the following adaptation should be executed for init update fields:
def init_views_counter_updated_at():
	for v in Viewer.objects.all():
		if not v.views_counter_updated_at:
			v.views_counter_updated_at = v.updated_at
			v.save()
update git ignore
update git ignore
add a "start_follow" and "stop_follow" ability for a discussion
Merge branch 'master' of https://github.com/TzahiM/NeuroNet