Usage:
class ProfileAddressForm(forms.Form):
address = forms.CharField()
class ProfileBirthDayForm(forms.Form):
birthday = forms.DateField()
class ProfileForm(CompositeForm):
form_list = [ProfileAddressForm, ProfileBirthDayForm]
profile_form = ProfileForm({"address": "13 Test St"})
assert profile_form.errors == {'birthday': [u'This field is required.']}