Better web browser command for Unix + generalized call (permit
multiple '%s').

- Split File->Open into File->Open and File->New (i.e., the file
  chooser now only accepts existing files for File->Open)

- Added "Online documentation" help menu

Fine-tune system menu bar

better name for MacOS system menu bar option

Better doc for Show/Hide

- Slightly reorganized the visibility browser window (the "toggle"
  behaviour in the input field was confusing)

- added Show and Hide commands in the parser to enable scripting of
  the visibility stuff

- Moved Visibility.{cpp,h} into Common/ to avoid dependencies with the
  Graphics library in the parser

- new DecomposeInSimplex plugin
- new "Combine Views" command in the parser
- cleaned up View::tranform and View::smooth (+small bug fix for SLs)
- better check for transparency sorting
- make depend
- new View.AlphaChannel option to change the transparency
  globally for a given view (instead of having to change the colormap
  by hand every time)

With all the above, we can now generate very nice (and correct)
transparent iso-surfaces:

Merge "../tutorial/view3.pos";

minIso = 0;
maxIso = 2;
nbIso = 7;

Plugin(CutMap).iView = 0;

For i In {1:nbIso}
  Plugin(CutMap).A = (maxIso-minIso)/nbIso * i;
  Plugin(CutMap).Run;
EndFor

Delete View[0];
Combine Views;

For i In {1:nbIso}
  Delete View[0];
EndFor

Plugin(DecomposeInSimplex).iView = 0;
Plugin(DecomposeInSimplex).Run;

View[0].AlphaChannel = 0.6;

Set View.ShowTime=2 to show the time value even if the view contains a single
time step..

make the Apple-style menu bar an option in configure

Reworked the help strings for all the plugins. Easier to understand,
now, Sean? :-)

Small gl2ps cleanups

Update gl2ps and associated doc

fix Compress help string

Add support for compressed PDF output

Fixed a couple more warnings + added AppleMenuBar option

Save the chosen FLTK theme in the per-session resources

Add DisplacementFactor option + rename ArrowScale->ArrowSize and
ArrowType->VectorType

Make it possible to change Triangle options

Some morer work on second order elements

Fix a couple of bugs for 2nd order elements. Seems to work OK for 2D
meshes now. 3D is still kinda flaky, and extrusion is not implemented.

Added warning + option for circle/ellipse arcs >= Pi

Corrections apres relecture / part 1

More work on chapters 1 and 2. Should be mostly OK now.

Major rewrite of the Overview section + web page

Added "gmsh -doc" to automatically generate the texinfo documentaion
for all the options.

New option to specify the interactive rotation center (default is now
the center of gravity, instead of 0,0,0)

Fix whitespace in copyright headers

Clean up VERSION_FLAGS and OS_FLAGS (use HAVE_FLTK instead of _FLTK,
remove _BLACKBOX, etc.)

Fixed a couple of typos + copyright dates

bump version to 1.37.0: system calls on Windows are now correctly implemented using the CreateProcess Windows API

Updated copyright

Enable occlusion culling by default

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

Fix typos + set default jpeg quality to 100

doc update

update tutorial.html + unnamed -> untitled

Save more window positions + polish previous commit (restore defaults)