Add test-cased for namespace-pkg zope and zope.interface.
Add script for building namespace packages for testing.
Update .gitignore: ignore generated namespace-packages.
Add test-cases for namespace packages.
Fix minor error in script for building namespace packages for testing.
Update build-script for eggs and commit built mini-namespace-packages.
Cleanup build script.
Fix: build script contains hard-coded Python version.
Make build script less verbose, so errors can be seen easier.
Add .toc-files for nspkg-testcases, so the .exe-content is verified.
Merge branch 'test-cases-for-namespaces' into modulegraph.