Update and re enable document_signature app

apps/document_signatures/forms.py

@@ -1,9 +1,5 @@
 from django import forms
 from django.utils.translation import ugettext_lazy as _
-#from django.utils.translation import ugettext
-#from django.core.urlresolvers import reverse
-#from django.utils.safestring import mark_safe
-#from django.conf import settings
 
 
 class DetachedSignatureForm(forms.Form):