Fix incorrect sorting of packages by string version instead of parsed version info.  Don't set a default Python version for distribution objects.  Add enum for binary distributions (like bdist_wininst).
Fix incorrect sorting of packages by string version instead of parsed
version info.  Don't set a default Python version for distribution
objects.  Add enum for binary distributions (like bdist_wininst).

--HG--
branch : setuptools
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/trunk/setuptools%4041068

pypa/setuptools,pypa/setuptools,pypa/setuptools