Python eggs and wheels now contain more modern information on the

package, including contact information, homepage URL, a suitable long

description for PyPI, and Python 3 compatibility markers. Python

requirement information was added, helping to prevent the package from

being installed on older versions of Python (such as Python 3.0 through

3.4). Some other bits of the setup.py have been cleaned up as well,

removing unnecessary code, adding a missing sys.exit(), and bringing

some definitions inline.
The wheels are now set to be universal, meaning the same wheel can be

installed both on Python 2 and 3. This will require some additional

changes in our build tools to support, though.
The macOS and Windows packaging scripts have also been updated. Windows

is now set to use a more modern version of Python 2.7, and uses curl

instead of PowerShell for downloading (working around SSL issues found

on Windows 7). It also no longer includes the final ".0" in the filename

for releases like "1.0.0," mirroring the filenames for the Python

packages.
macOS is being prepared for future Python 3 support (which still doesn't

exist in macOS, so it hasn't been turned on), along with using the

universal wheel.
The old release script, which we haven't used in years, has also been

removed.

Built Python and macOS packages for all supported Python versions.
The Windows packages have not been tested yet, as my build

infrastructure requires some unrelated work before I can test it

thoroughly.