Add LICENSE to MANIFEST.in
Merge pull request #472 from sivel/license-manifest

Add LICENSE to MANIFEST.in
Add __version__ since a lot of people expect to be here
get_metadata in object_storage should always allow specifying prefix
Merge pull request #474 from sivel/dunder-version

Add __version__ since a lot of people expect to be here
Merge pull request #475 from sivel/get-metadata-prefix

get_metadata in object_storage should always allow specifying prefix