More durable deployment

[vilmibm]

Town is so old that as we've upgraded Ubuntu and gotten new Python versions I've had to rebuild bbj's virtual environment and sometimes fix compatibility issues with its dependencies. It's not the biggest deal but I would love to see bbj deployable in an isolated, self contained way that is orthogonal to system python (which is something that virtual envs claim to provide but don't in actuality).

I've had great luck with https://pyinstaller.org/en/stable/ combined with pip-compile ( https://pypi.org/project/pip-tools/ ) but I don't know off the bat how amenable bbj will be to this kind of deployment (I suspect fine).

The end result of this would be doing a build of bbj and uploading it to github as a release such that tilde server admins can just pull an executable and run it.

I'd be happy to work on this but can't start for a couple of weeks as I finish something else.