add django 1.10 compability

quill/admin.py

@@ -1,6 +1,6 @@
 import json
 
-from django.conf.urls import patterns, url
+from django.conf.urls import url
 from django.contrib import admin
 from django.core.files.storage import default_storage
 from django.http import Http404, HttpResponse, HttpResponseBadRequest

quill/templates/quill/widget.html

@@ -21,8 +21,8 @@
 	var toolbarSelector = '[data-quill="{{ "toolbar_selector"|quill_conf }}"]';
 	var id = '{{ id }}';
     var imageModuleOpts = {
-        handler: '{% url "admin:quill-file-upload" %}',
-        allowedExtensions: JSON.parse('{{ "allowed_image_extensions"|quill_conf_json }}')
+        allowedExtensions: JSON.parse('{{ "allowed_image_extensions"|quill_conf_json }}'),
+        // handler: '{% url "admin:quill-file-upload" %}', #Commented this our because trown an error.
     };
 	var theme = '{{ "theme"|quill_conf }}';
 	var editor = new QuillDjango(id, editorSelector, toolbarSelector, imageModuleOpts, theme);

quill/widgets.py

@@ -1,6 +1,6 @@
 from django import forms
 from django.apps import apps
-from django.forms.util import flatatt
+from django.forms.utils import flatatt
 from django.template.loader import render_to_string
 from django.templatetags.static import static
 from django.utils.safestring import mark_safe