Remove fix_setuptools_chmod hack.

Use hashbang guards in Python files instead.
Ignore pyc and other generated files.
Use git tags for version information.

Extract version data from version.cfg.
Update MANIFEST.in to build valid source package.
Update dependencies and package metadata.
Remove obsolete Make.mm related files.

Not used for a long time.  Unlikely to be ever used again.
Remove subversion keywords and trailing whitespace.