Show appenv version somewhere?

[wosc]

In downstream packages that use appenv (like... batou :) it would be helpful to know which appenv version they bundled. For example, in the version bundled with batou-2.0b9, the appenv-update-lockfile command does not work (it exits with "unrecognized arguments: -u").

I've solved my immediate issue by downloading https://github.com/flyingcircusio/appenv/blob/dc208ac9df334962b013001c60cd93fb88949c98/src/appenv.py and naming it batou, but I think this points to an issue how to manage bundling and versions and somesuch.

[ctheune]

Yeah, that will be important at some point.