templatekw: copy {author} to {user} and document {author} as an alias
In other places including "log -Tjson" and revset, "user" is the canonical
name. Let's standardize it.
This is a part of the name unification of the Generic Templating Plan.
https://www.mercurial-scm.org/wiki/GenericTemplatingPlan#Dictionary
# name space package to host third party extensions
from __future__ import absolute_import
import pkgutil
__path__ = pkgutil.extend_path(__path__, __name__)