[Distutils] Wheel 0.32 released

This release contains the following significant changes: * Wheel signature generation and verification commands have been removed * The wheel installation features have been removed * The documentation has been rewritten to conform to the PyPA guidelines * The ability to add multiple license files to the wheel has been added (the most common ones are included by default) There were also a few bug fixes as well. If you are left missing the removed features, let me know on the issue tracker.