Merge pull request #180 from PrivateStorageio/179.copyable-sharestat

src/_zkapauthorizer/_plugin.py

src/_zkapauthorizer/controller.py

src/_zkapauthorizer/foolscap.py

src/_zkapauthorizer/resource.py

src/_zkapauthorizer/tests/fixtures.py

src/_zkapauthorizer/tests/foolscap.py

src/_zkapauthorizer/tests/test_client_resource.py

src/_zkapauthorizer/tests/test_controller.py

src/_zkapauthorizer/tests/test_foolscap.py

src/_zkapauthorizer/tests/test_plugin.py