basic support for non-egg resources.  Still a lot to do, but this version
is capable of not only extracting and running C extensions, it can even
find its own runtime (pkg_resources) if it's included in the egg.

--HG--
branch : setuptools
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/trunk/setuptools%4040994