matplotlib Code

Modified numerix numarray type definitions to Numeric typecodes.

updated backend template to new text api

fixed ismath sig across backends

fixed a few small mathtext bugs

added mathtext changes to changelog

major rewrite of mathtext

Added a Matrix capability for numarray to numerix.

fixed makefile and some text bugs

duh?

Reorganized whats_new.html.template to use dictionary to store
release info, and correspondingly replaced template section with
a simple nested loop. Also added anchors for versions and new items
for other pages to link to. Made such changes in goals.txt to
make such links.