xgobi/ggobi

I concluded this was at best a beta.  Standalone winggobi worked under
some brief tests, albeit much slower than xgobi (using Exceed 6.2 to
display) on the same machine.

There is a speed problem on Windows that we know about:

 Under *nix, it makes little or no time difference whether I call
 gdk_draw_point or segment N times, or whether I call
 gdk_draw_points or segments once with N points.

 Under Win32, however, the batched calls seem to be about 20 times
 faster.

 This would not be a problem except that gdk contains these batched
 calls only for points and lines, so I'll eventually need to write
 them (or find a recruit to write them) for arcs and rectangles.

Debby
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