matplotlib Code

Add some hyperlinks. Clean up formatting.

Move examples from pylab to api.

Adding cross-references.

equation rendering is now working using Jens Mortensen's
mathpng extension. The syntax is illustrated in the
developers guide, in the "Documenting Matplotlib" section

Add support for syntax-highlighting ipython console sessions.

use mathpng extension rather than mathml
generate html rather than xml

removed old make

renamed users_guide.txt and developers_guide.txt, use underscores

moved api_reference docs out of source to flatten the directory structure

moved users_guide sources out of sources, into parent directory
for flat rather than nested structure