Update source app code for new extracted formtools package.

mayan/apps/sources/wizards.py

@@ -1,12 +1,13 @@
 from __future__ import unicode_literals
 
 from django.contrib import messages
-from django.contrib.formtools.wizard.views import SessionWizardView
 from django.core.urlresolvers import reverse
 from django.http import HttpResponseRedirect
 from django.utils.http import urlencode
 from django.utils.translation import ugettext_lazy as _
 
+from formtools.wizard.views import SessionWizardView
+
 from common.mixins import ViewPermissionCheckMixin
 from documents.forms import DocumentTypeSelectForm
 from documents.permissions import permission_document_create

mayan/settings/base.py

@@ -43,7 +43,6 @@ INSTALLED_APPS = (
     'django.contrib.admin',
     'django.contrib.admindocs',
     'django.contrib.auth',
-    'django.contrib.comments',
     'django.contrib.contenttypes',
     'django.contrib.messages',
     'django.contrib.sessions',
@@ -57,6 +56,7 @@ INSTALLED_APPS = (
     'corsheaders',
     'djcelery',
     'filetransfers',
+    'formtools',
     'mptt',
     'pure_pagination',
     'rest_framework',