matplotlib Code

cosmetic changes

2008-09-14 Reorganized cbook and mlab methods related to numerical
calculations that have little to do with the goals of those two
modules into a separate module numerical_methods.py
Also, added ability to select points and stop point selection
with keyboard in ginput and manual contour labeling code.
Finally, fixed contour labeling bug. - DMK

* Moved several function in mlab.py and cbook.py into a separate module
numerical_methods.py because they were unrelated to the initial purpose of
mlab or cbook and appeared more coherent elsewhere.

moved font examples to api

added a couple of font examples

updated the wx animation examples

replaced ipython run magic with code.InteractiveConsole.runsource

added get_children to artist base class

add colorbar

Fix backticks in PS output.

Fix backticks in PS output.