First round of prepping setuptools for inclusion in Python 2.5: move
site.py to setuptools/site-patch.py; reinstate 'python -m easy_install'
support; use distutils' "upload" command when running under 2.5.

--HG--
branch : distribute
extra : source : fbb6c89a74aa47a556a936202d2e50051b067940
extra : histedit_source : 778122fc56bcca6f5a1dbd5a475df11d29028730