Changes:
* Special.c: Keep transparent background in rescaled included bitmaps
* special.c: Add the color PostScript prologue
* dvipng.h, special.c: Support xcolor PostScript prologue
* color.c: Support x11nam.def, fix handling of xcolor
multiple-model color values, and xcolor PostScript prologue
* special.c: Some (most?) literal PostScript specials seem to
depend on tex.pro and possibly special.pro, always load these
* configure.ac: Fix gs checks
* misc.c: Correct last mmap element
* readme.texi: Mention new color models in xcolor
* color.c: Adjust for new version of xcolor, mainly color prefixes
This program makes PNG and/or GIF graphics from DVI files. It produces
high-quality images while its internals are tuned for speed. It supports PK,
VF, PostScript and TrueType fonts, color, PostScript inclusion, bitmap
inclusion, and has CJK support
