spreading 'vsc' namespace across directories doesn't work with zipped eggs

[boegel]

pkgutil.extend_path (used in all vsc/__init__.pys) doesn't work with zipped eggs

a patched version is available at NiklasRosenstein/python-localimport@7c0b9ef

[stdweird]

we can ship localimport in vsc-base or vsc-install, can you make a PR that works?

[boegel]

I'd like to understand why this is somehow not a problem if for example both vsc-base and vsc-mympirun are installed as zipped .eggs.

[boegel]

fixed with #212 by switching to pkg_resources.declare_namespace? @stdweird?