include copy of django_extension, dont install django from git

contrib/django_extensions/docs/validate_templates.rst

@@ -0,0 +1,35 @@
+validate_templates
+==================
+
+:synopsis: Checks templates on syntax or compile errors.
+
+Options
+-------
+
+verbosity
+~~~~~~~~~
+A higher verbosity level will print out all the files that are processed not just the onces that contain errors.
+
+break
+~~~~~
+Do not continue scanning other templates after the first failure.
+
+includes
+~~~~~~~~
+Use -i (can be used multiple times) to add directories to the TEMPLATE_DIRS.
+
+Settings
+--------
+
+VALIDATE_TEMPLATES_EXTRA_TEMPLATE_DIRS
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+You can use `VALIDATE_TEMPLATES_EXTRA_TEMPLATE_DIRS` to include a number of template dirs per default directly from the settings file.
+This can be usefull for situations where TEMPLATE_DIRS is dynamically generated or switched in middleware or you have other template
+dirs for external applications like celery you want to check as well.
+
+Usage Example
+-------------
+
+ ./manage.py validate_templates
+