Remove all mention of make.osx in README.osx

Author: dmcdougall

README.osx

@@ -1,30 +1,24 @@
 Building mpl on OSX has proven to be a nightmare because of all the
 different 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 file
-in this directory.  This script requires you to set a PREFIX
-environment variable where you want the install to go.  It will
-fetch the dependencies from a remote server and install them into your
-PREFIX dir, and then build mpl against them.  It should ignore any
-lib, png or freetype on your system
+The recommended and supported way to build is to use a third-party
+package manager to install the required dependencies, and then
+install matplotlib from source using the setup.py script. Two widely
+used package managers are homebrew and MacPorts. The following
+example illustrates how to install libpng and freetype using
+homebrew.
 
 Example usage::
 
-  make -f make.osx PREFIX=/Users/jdhunter/dev PYVERSION=2.6 \
-    fetch deps mpl_install_std
-
-Variables:
-    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
+  brew install libpng freetype
+
+If you are using MacPorts, execute the following instead:
+
+Example usage::
+
+  port install libpng freetype
+
+To install matplotlib from source, execute:
+
+Example usage::
+
+  python setup.py install