v0.0.40

Nicolas Dandrimont

@olasd

8c6e8d71 · d/control; requirements: Bump swh.core dependency to 0.0.20 · Jun 14, 2016

Release swh.storage v0.0.40:

 - Refactor objstorage to allow for different implementations
 - Updates to the checker functionality
 - Bump swh.core dependency to v0.0.20