[pkg] Use setuptools.find_packages() We drop the custom get_packages() function in setup.py that used to look for test files (not discovered automatically since test directories are not packages) and replace it by explicit entries in MANIFEST.in.

[pkg] Drop SandboxViolation verification cracking Dunno what this is for. Let's see if this work without.

[pkg] Drop custom "install_data" command Not sure what this is for, the comment mentions "egg" directory, but this is quite likely an old hack that should be unnecessary when using a recent setuptools.