work around compatibility issue

lms/djangoapps/django_comment_client/utils.py

@@ -13,7 +13,7 @@ from mitxmako import middleware
 import logging
 import operator
 import itertools
-import pystache
+import pystache_custom as pystache
 
 
 _FULLMODULES = None

requirements.txt

@@ -45,4 +45,5 @@ django-storages
 django-threaded-multihost
 django-sekizai<0.7
 git+git://github.com/benjaoming/django-wiki.git@97f8413
+git+git://github.com/dementrock/pystache_custom.git
 -r repo-requirements.txt