Commit [f46744] Maximize Restore History

First import and conversion of TriD graphics chapter

This is the first cut of the 3D graphics chapter
from the text of the existing PDL Book. It is
clear that work needs to be done and more flesh
and better examples provided.

Chris Marshall Chris Marshall 2012-01-23

added PDL/Book/graphics_3d/gnuplot-eg.png
added PDL/Book/graphics_3d/pdltrid-eg1.png
added PDL/Book/graphics_3d/pdltrid-eg2.png
added PDL/Book/graphics_3d.pod
PDL/Book/graphics_3d/gnuplot-eg.png Diff Switch to side-by-side view
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PDL/Book/graphics_3d/pdltrid-eg1.png Diff Switch to side-by-side view
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PDL/Book/graphics_3d/pdltrid-eg2.png Diff Switch to side-by-side view
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PDL/Book/graphics_3d.pod Diff Switch to side-by-side view
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