zn_poly-0.9-bp151.2.13

- Use source URLs
- License change to BSD-2-Clause (+GPL)

- Notice from the zn_poly homepage: zn_poly is no longer maintained.
  It is however still used by SAGE, so let's see where it goes.

- BuildRequires libtool on 12.2 and higher

- recompress source file to bzip2 format to allow build on SLE-11

- Initial package for build.opensuse.org