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NEW FEATURES:
* Added a ``--git_remote`` argument, ``PMAC_GIT_REMOTE`` environment variable,
and ``git_remote`` configuration option which, when specified, will cause
pmac to use that as the remote name and not guess. (10)
OTHER THINGS:
* Added a Makefile because that's how I roll.
* Tweaked ``pmac --help`` so it shows the version and release date and link to
issue tracker.
* Cleaned up README.
* Made a peanut butter pie and ate it.