relax SVN archive

This removes the need for the patch given by Jack Howarth <howarth att bromo dot med dot uc dot edu>
in the message https://mail.gna.org/public/relax-users/2010-02/msg00031.html.

A similar python specific path was being used to find Python.h on all architectures, so the include
path was copied and modified to be a bin path.