update AUTHORS

don't use print statements in setup.py

python 3 doesn't like them.

update MANIFEST.in

update NEWS

enhance make-win-release a bit

choose the right python versions to build with and also build .msi
installers.

build release for python 3.0/3.1

Don't use xrange(), Py3k compatibility.

Add a C API reference, and fix signature for PyGreenlet_Throw()