Alexis S. L. Carvalho <alexis@cecm.usp.br> [Tue, 06 Feb 2007 15:55:20 -0200] rev 4066
setup.py: reload __version__.py after writing it.
write_version loads __version__.py before writing it (see 7eb694a1c1af),
so we have to explicitly reload it to use the correct version.
Problem diagnosed by Christian Ebert.