Bug fix for pickling crispy forms by @powderflask

See issue #107 for details
Don't display legend if not provided
Use formset iterator instead of forms list attribute
Fixing bug with multiple forms
Update index.rst
Merge branch 'empty-legend' of git://github.com/borgstrom/django-crispy-forms into dev
Merge branch 'formset_iterator' of git://github.com/danxshap/django-crispy-forms into dev
Merge branch 'dev' of git://github.com/SpazioDati/django-crispy-forms into dev
Merge branch 'dev' of git://github.com/evildmp/django-crispy-forms into dev