title: Is it possible to use django-crispy-form FormHelper without modifying Form class
body: <p>For the sake of consistency I want to use crispy with my login form.
  I'm using <code>'django.contrib.auth.views.login'</code> and I'm only coding the template.</p>
  
  <p>The problem is <code>{% crispy form %}</code> doesn’t output submit button nor "next" hidden field.</p>
  
  <p>Is there any way to create <code>FormHelper</code> outside of <code>forms.py</code> ( it's in contrib.auth so I would need to try to extend <code>AuthenticationForm</code> or something like it) an then use it in the template without modifying <code>views.py</code>(also in contrib.auth)</p>
  
  <p>If it would require any ninjitsu with extending classes etc. I will go with pure HTML but if there is a simple way to include 'external' <code>FormHelper</code> on the template level i would regret not asking</p>