Approved by kei@ and wiz@.
Changes since 20021230:
* Fixed a bug on the algorithm converting arc to cubic bezier
curves in arc() (tpic.c), which is reported by Werner Lemberg.
* PNG support completely rewritten. Color pallete images are
now not converted to 24-bit RGB, colorspace Indexed is used
instead. Added tRNS and alpha chunnel (transparency) support.
Experimental gAMA, cHRM and sRGB support.
* Fixed bug that dvipdfmx stops with error "Invalid Subr Index"
when embedding CFF OpenType font.
* Add a missing line including pdfparse.h in dvi.c, which is
reported by Akira Kakuto.
* Changed the default font map files for teTeX 2.x as suggested
by Haruhiko Okumura.
* A bug on the paper size checking routine of dvi_paper_size()
in dvi.c is fixed, which is reported by Haruhiko Okumura.
* A bug on the kerning routine of dev_set_string() in pdfdev.c is
fixed, which is reported by Edward G.J. Lee.
* Changed to embed images only one time.
* Updated configure.in and config.h.in to support WORDS_BIGENDIAN
and SIZEOF_SHORT, SIZEOF_INT, SIZEOF_LONG.
* A faked font name was used for TrueType fonts without any PS
font name as suggested by Hin-Tak Leung.
* Built-in codes (originally from libgcrypt-1.1.42) was used
for PDF encryption instead of the OpenSSL library as suggested
by Thomas Esser.
* A significant bug reported from Haruhiko Okumura is fixed.
The bug occurs only if compiled with gcc 3.x, not gcc 2.x.
* New feature, hexadecimal Unicode, suggested by iNOUE Koich!
and Akira Kakuto is implemented.
* Fixed bugs on reading and writing OpenType fonts.
* Applied changes for MiKTeX in ps_include() (psimage.c).
* Fixed a bug in cff_charsets_lookup() (cff.c).
* Fixed a bug in string_mode() (pdfdev.c) reported by iNOUE Koich!.
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