Code review comment for lp:~allenap/maas/repackage

> Running `make` was failing with "Error: pg_config executable not found." until
> I ran "sudo apt-get install libpq-dev python-dev".

One of the things missing in this branch is the division between
production and development package dependencies: the Python packages
themselves (see pkg/*/package.txt and pkg/*/configure.py) arrange for
installation of package dependencies, but I've not added code to
distinguish between run-time and test-time.

I'll see what I can do.