#24 Some pixmap color schemes not good

[Bob Glamm]

planetary pixmaps (atmospheres, resources, facilities, etc.) need better color schemes - this is related to the previous "excessive images" bug. Taking care of excessive images plus better less-colored atmospheres would eliminate the
problem of seeing enemies or enemy torps over planets.

Of course, if planets were solid that would eliminate that problem, but they're
not, so we need new pixmaps.