title: Pyramid and FormAlchemy admin interface
body: <p>I have a pyramid project using the formalchemy admin interface. I added the basic ACL authentication and the pyramid_formalchemy plugin always denys even though I am authenticated.</p>
  
  <p>Any thoughts on how only allow authenticated users to use the pyramid_formalchemy admin interface?</p>
  
  <p>The authorization policy was add like this:</p>
  
  <pre>
  authn_policy = AuthTktAuthenticationPolicy('MYhiddenSECRET', callback=groupfinder)
  authz_policy = ACLAuthorizationPolicy()
  
  config = Configurator(
     settings=settings,
     root_factory='package.auth.RootFactory',
     authentication_policy=authn_policy,
     authorization_policy=authz_policy
  )
  
  # pyramid_formalchemy's configuration
  config.include('pyramid_formalchemy')
  config.include('fa.jquery')
  config.formalchemy_admin('admin', package='package', view='fa.jquery.pyramid.ModelView')
  </pre>