matplotlib Code

Create path_cleanup code for use by the Mac OS-X backend. Refactor C++ code to follow Numpy's guidelines for linking multiple C files into a single extension. Remove dependency of Agg backend on _image.cpp and _ft2font.cpp (simplifies linking problems and reduces generated code size).

Rework the nan-handling/clipping/quantizing/simplification
framework so each is an independent part of a pipeline.
Expose the C++-implementation of all of this so it can be
used from all Python backends. Add rcParam
"path.simplify_threshold" to control the threshold of
similarity below which vertices will be removed.

Merged revisions 6827 via svnmerge from
https://matplotlib.svn.sf.net/svnroot/matplotlib/branches/v0_98_5_maint

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r6827 | mdboom | 2009-01-26 09:32:42 -0500 (Mon, 26 Jan 2009) | 2 lines

Make curves and NaNs play nice together
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Change simplification algorithm so it always returns points from the original data, rather than extrapolated ones. This is somewhat experimental.

Remove need for m_done flag in simlifier -- we can just put a path_stop onto the queue instead. Saves one boolean test on every iteration.

Use miter_join_revert in Agg backend to match behavior of other backends.

Bugfix of C typedef of MPL_Int64 failing on WinXP64

apply Michiel's patch to macosx backend to fix rounding bug - closes
sf bug 2508440.

applied michiel's hatch patch for macosx sf id 2497785

Add more hatch styles. Improve consistency across backends.