matplotlib Code

Fix handling of c kwarg in scatter, with array of strings;
modification of patch by Ryan May. The fix involves making
cbook.is_string_like handle variables of type numpy.string_.

Make iterable() and is_string_like() return True/False instead of 1/0.

whitespace deletion in cbook.py

cleaned up output of mathmpl and plot directive; added thumbnail gallery

removed numerical_methods from imports

fixed cbook.flatten so its docstring example works
Previously, flatten(('a','b')) triggered infinite recursion.

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.

Fix conversion of quadratic to cubic Bezier curves in PDF
and PS backends. Patch by Jae-Joon Lee.

import warnings; close bug # 2053683

cleaned up a few rest doc warnings