write: add the possibility to pass keyword argument from batchget to vfs We are going to pass atomictemp keyword argument from merge.baychget to vfs.__call__. Update all the frames to accept **kwargs and pass it to the next function. Differential Revision: https://phab.mercurial-scm.org/D1881

# name space package to host third party extensions
from __future__ import absolute_import
import pkgutil
__path__ = pkgutil.extend_path(__path__, __name__)