add docs on storage and staticfiles finder

docs/index.rst

@@ -20,6 +20,7 @@ Table Of Contents
    compilers
    versioning
    templates
+   storages
    farfutureexpires
    backwardsincompatiblechanges
 

docs/storages.rst

+.. _ref-storages:
+
+========
+Storages
+========
+
+Using with a custom storage
+===========================
+
+Pipeline use `Django Storage <https://docs.djangoproject.com/en/dev/ref/files/storage/>`_
+to read, save and delete files, by default it use an improved ``FileSystemStorage``.
+
+You can provide your own via ``PIPELINE_STORAGE`` : ::
+
+  PIPELINE_STORAGE = 'storages.backends.s3boto.S3BotoStorage'
+
+
+Using with staticfiles
+======================
+
+Pipeline is providing a Finder for `staticfiles app <https://docs.djangoproject.com/en/dev/howto/static-files/>`_,
+to use it configure ``STATICFILES_FINDERS`` like so : ::
+
+  STATICFILES_FINDERS = 'pipeline.finders.PipelineFinder'
+

docs/templates.rst

+.. _ref-templates:
+
+====================
 Javascript Templates
 ====================