-----------------
* Pulled all changes from upstream Django:
* ``static`` template tag to refer to files saved with the
``STATICFILES_STORAGE`` storage backend. It’ll use the storage ``url``
method and therefore supports advanced features such as serving files
from a cloud service.
* ``CachedStaticFilesStorage`` which caches the files it saves (when
running the ``collectstatic`` management command) by appending the MD5
hash of the file's content to the filename. For example, the file
``css/styles.css`` would also be saved as ``css/styles.55e7cbb9ba48.css``
* Added a ``staticfiles.storage.staticfiles_storage`` instance of the
configured ``STATICFILES_STORAGE``.
* ``--clear`` option for the management command which clears the
target directory (by default ``STATIC_ROOT``) before collecting
* Stop trying to show directory indexes in the included ``serve`` view.
* Correctly pass kwargs to the URL patterns when using the static URL
patterns helper.
* Use sys.stdout in management command, not self.stdout which was only
introduced in a later Django version.
* Refactored AppSettings helper class to be only a proxy for Django's
settings object instead of a singleton on its own.
* Updated list of supported Django versions: 1.2.X, 1.3.X and 1.4.X
* Updated list of supported Python versions: 2.5.X, 2.6.X and 2.7.X