Adds python-distutils-extra as a bin dependency.

ok, from what I see "the guilty commit" is http://bazaar.launchpad.net/~python-distutils-extra-hackers/python-distutils-extra/debian/revision/199
The old module took python-distutis-extra as part of the python base module, hence the fact it wasn't added as a binary dependency.

As setup.py is scanned by the install_egg_info call, depends from there are added to the egg file, and so, as bin dep.

The ideal situation and smartest way would be:
- dep in setup.py -> build-dep
- dep everywhere else -> dep

but the egg files contains both and there is no distinction AFAIK. Looking up at distutils content, it seems to be deep in dist.py requires… Not sure there is a way without touching it to tell "please ignore that file". We can workaround it in ignore p-d-e ourself, but what if the application really needs it?

scanning again ourself the tree can be suboptimal as well, not really sure what we should do for that (wait for distribute? ;))

I just proposed https://code.launchpad.net/~mterry/python-distutils-extra/skip-setup.py for merging. It basically just skips a file in the toplevel directory called 'setup.py' when calculating module requirements.

However, Didier did bring up a good point that build-deps are manual right now and it would be nice if distutils-extra could also calculate those from setup.py. I'll open a separate wishlist bug for that.

Build time dependency request filed as bug 652162.

Merged with the accompanying test case update. Thanks Mike!

Thanks Guys. These dependencies turned even tiny 50kb apps into mega bytes.