couple of bugs from he mailing list

- 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

Fix rare crash due to Fl_Widget::tooltip() not actually copying the
string.

Fixed bug in DecomposeInSimplex (need to set deleted non-simplex lists
to NULL)

Fixed missing exception handling for PluginManager::action() (this led to
a crash when General.DefaultPlugins==0).

Be less verbose (especially since Msg can cause race conditions in this code

- 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..

print info in all cases

Fix name

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).

Make Merge/Save/Print/Open behave like Include, i.e., open the file in the
same directory as the main project file (if the path is relative).

Make Skin a little bit more efficient by allocating/copying the values
only if the face is not found in the tree

displacement with other field animation example

One last fix to build the non gui version on OS X

Trying to fix compilation problems on old DEC stations (missing
vsnprintf and snprintf functions).
)

tag 1.48

forgot fclose

check if the file exists before trying to merge it

Oops, copy/paste mistake

Say if the plugin is executed in-place or if it creates new views

Correctly update View.Index when a view is deleted from the list

Generalization to all kinds of elements and field types

The new levelset stuff is too powerful ;-)

- don't cut the timestep in the levelset view if the timestep is
  used to get the field value. I think this makes it less confusing
  (and matches the behaviour of JF's old 'iField' option).

- rename the 'TimeStep' option to 'dTimeStep', also to avoid
  confusing people about which view the time step refers to.

typos, comments

To avoid surprising results, don't try to plot values of different types
on the levelset if the value view (w) is the same as the levelset view (v)

small makefile for the levelset benchmark