include copy of django_extension, dont install django from git

contrib/django_extensions/docs/sync_s3.rst

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+sync_s3
+=======
+
+:synopsis: sync your MEDIA_ROOT and STATIC_ROOT folders to S3
+
+Django command that scans all files in your settings.MEDIA_ROOT and
+settings.STATIC_ROOT folders, then uploads them to S3 with the same
+directory structure.
+
+This command can optionally do the following but it is off by default:
+
+  * gzip compress any CSS and Javascript files it finds and adds the
+    appropriate 'Content-Encoding' header.
+  * set a far future 'Expires' header for optimal caching.
+  * uploads only media or static files.
+
+
+Example Usage
+-------------
+
+::
+
+  # Upload files to S3 into the bucket 'mybucket'
+  $ ./manage.py sync_s3 mybucket
+
+::
+
+  # Upload files to S3 into the bucket 'mybucket' and enable gzipping CSS/JS files and setting of a far future expires header
+  $ ./manage.py sync_s3 mybucket --gzip --expires
+
+::
+
+  # Upload only media files to S3 into the bucket 'mybucket'
+  $ ./manage.py sync_s3 mybucket  --media-only  # or --static-only
+
+
+Required libraries and settings
+-------------------------------
+
+This management command requires the boto library and was tested with version
+1.4c:
+
+  http://code.google.com/p/boto/
+
+It also requires an account with Amazon Web Services (AWS) and the AWS S3 keys.
+The keys are added to your settings.py file, for example::
+
+  # settings.py
+  AWS_ACCESS_KEY_ID = ''
+  AWS_SECRET_ACCESS_KEY = ''