matplotlib Code

Speed improvements -- determine path extents in C

Increase performance of draw_markers in Agg backend

fixes for fillcontinents in ortho

updated coding guide with trailing whitespace config suggestion

more orthographic fixes

more fixes for orthographic

fix for orthographic projection.

Remove fonts/otf directory in list of data files.

Major speed improvements for auto-placing of legends.

Fix marker drawing bug, and improve speed (by using buffers on the
stack if possible).