This provides an easy way to install new or old Python versions on Unixish
systems. It is mainly intended for testing Mercurial with different Python
versions.
Example:
$ cd build
$ make -f ../contrib/Makefile.python python PYTHONVER=2.4 PREFIX=/tmp/p24
$ /tmp/p24/bin/python -V
Python 2.4
Tested on Fedora, Debian and Ubuntu with Python versions from 2.4 to 2.7.6.
Most Python versions need some workarounds to compile on Debian-ish systems.
The workarounds do not do any significant harm on Fedora.
