[PATCH 0 of 3] Making PyHurd build again under cython 0.14.1.

[arne_bab]

This patch makes pyhurd build again under cython 0.14.1.

It is quite rough (copied a file from cython, needs to be included cleanly).

This included file is licensed under Apache 2.0, so PyHurd has to be switched 
to GPLv3 to avoid a 
license conflict (I adjusted the copyright header).

I verified that the showtrans.py example works, now: 

# PYTHONPATH="/root/pyhurd/build/lib.gnu-0.3-i686-AT386-2.6"               
            python examples/showtrans.py /ftp\:                                 
                         
            /hurd/hostmux