Building mpl on OSX has proven to be a nightmare because of all thedifferent types of zlib, png and freetype that may be on your system.The recommended and supported way to build is to use the make.osx filein this directory.  This script requires you to set a PREFIXenvironment variable where you want the install to go.  It willfetch the dependencies from a remote server and install them into yourPREFIX dir, and then build mpl against them.  It should ignore anylib, png or freetype on your systemExample usage::  make -f make.osx PREFIX=/Users/jdhunter/dev PYVERSION=2.6 \    fetch deps mpl_install_stdVariables:    PREFIX (required): where to install the dependencies    PYVERSION (optional): which python version to use       (default=python, e.g. PYVERSION=2.6 uses python2.6)Targets:  clean: remove compiled files  fetch: download dependencies  deps: build all dependencies (zlib, png, freetype)  mpl_build: compile matplotlib  mpl_install: install matplotlib in $PREFIX/lib/pythonX.Y/site-packages  mpl_install_std: install matplotlib in standard site-packages directory  mpl_install_egg: install matplotlib as an egg  mpl_install_develop: set up egg link to working directory (for developers)  binaries: create the dmg file for distribution