* Fix POSTSCRIPTSTREAM to accept SMALLP values 0 and 1 as COLOR.
(Don't require them to be FLOATP.)
* Changed handling when color values are not directly interpretable without other context (e.g., as an index into a color map).
POSTSCRIPTSTREAM should behave similar to INTERPRESS and just ignore a BRUSHCOLOR if it is a SMALLP that's neither 0 nor 1, and use the current DSPCOLOR of the stream.
If someone wants a specific color, or grayscale, they can use the color descriptions as documented in POSTSCRIPTSTREAM.TEDIT.
* Update documentation to better describe allowed COLOR specification.
* I put in support for standard color specifications. I think this is pretty close.
BLTSHADE, FILLCIRCLE, and FILLPOLYGON with the TEXTURE as TEXTUREP or BITMAPP convert to a gray scale as a function of the number of bits set.
It'll take a bunch more refreshing of PostScript knowledge to figure out how to do these with real colors, and actual pixel-by-pixel textures.
