- only save the options that differ from the default values (unless we
  explicitly ask to save everything)

- tweak the auto doc routines

upgrade gl2ps to 1.2.0

- add GUI for exporting characteristic length fields
- error->warning if lc <= 0
- don't enable POLYGON_OFFSET_FILL for 3D isos

Use bigger subdivision threshold for fake ps smooth shading

...and use vector ps/eps/pdf by default

disabled PostScript Level 3 shading operator by default (and added a
new option to change it: Print.EpsPS3Shading)

use rasterpos2d

New raster ("bitmap") PS/EPS/PDF output

Update copyright notice

Cleaned up the whole Include/Merge/Open mess (removed the ugly
yyin/yyname tables in the parser, made the Merge routine reentrant
+ uniformized all the INFO/STATUS messages).

This should fix a nasty side effect from this morning's
commit (wrong yynames when doing multiple merges in the same
file).

Small gl2ps cleanups

open eps/pdf files in binary mode

Add support for compressed PDF output

Open pdf files in binary mode

Fix feedback buffer size for tex output

New native PDF support

One more warning

Fixed a couple more warnings + added AppleMenuBar option

Added PNG support

Fix whitespace in copyright headers

Upgrade to latest gl2ps version

Indented all source files using utils/gmshindent

Updated copyright

New occlusion culling code contributed by the guys from CERN. Disabled
by default.

after CreateOutputFile, preventing consecutive "Print" in the parser
to change format correctly

"save as" stuff. This will only work with fltk > 1.1.0rc4 (Michael
Sweet added 2 functions to the fltk file chooser specially for us!)

Interface polish (buttons should not be resized when the size of the window is changed);
gl2ps update (not finished);