Write documentation for the soy.materials module, its types, and their methods/properties. Include at least one doctest for each material class to show how it can be used.

This will take the form of PyDoc strings embedded in PySoy, you'll need to start by building libsoy and PySoy from Mercurial and then editing or adding PyDoc strings to pysoy/src/materials/*.c.

While working on this task you should join and remain in #PySoy on Freenode to get help, feedback, and guidance from mentors and other developers. Code updates which may affect your work are also announced here as they happen.

When you've done, commit your work and post the resulting changeset url to this task.