use v0, v1, ..., vn to access the other components of the field

copyright update

- More intelligent way to detect if we need to apply a polygon offset
or not.

- better computation of translation coef in Draw2D

Added 2 options to control polygon offset. Instead of trying to guess
when a polygon offset is useful (it's no that simple when we combine
geo+mesh+some views), we just apply it conditionally to all surface
drawings.

fixed computation of Min/Max when the view contains different element types

Replaced all *non-modal* Fl_Windows with either Dialog_Windows or
Main_Windows, which are derived from Fl_Window amd correctly process
the OS-specific "Close Window" shortcuts (Pomme+W on MacOS, Alt+F4 on
Win32).

Small aesthetic changes:

- Only 'title-capitalize' window titles and menus; the rest should be
  capitalized like normal english sentences

- The window title should be exactly the same as the menu item
  (without the ellipsis character if there is one)

- reworked the keyboard shortcuts with Laurent (our very own Macintosh
  Usability Guidelines Expert)

- new smoothing option for jpeg output

- new small GUI dialogs for ps/pdf/jpeg/gif/msh output (makes the
  'format' menu in the file dialog much shorter)

removed unused extern

update docs

- cleaned up + generalized font selection
- generalized Plugin(Annotate) to allow font style selection for
  each text fragment
- fixed bug in per-view color selection

don't require gl2ps

missing line_width/point_size calls

clarify help

forgot to recompute the bbox

add a comment around a test copied as-is from the old Gradient plugin

merged Plugin(Lambda2) and Plugin(Gradient) in a single plugin, so that
we free up Plugin(Gradient) for future use

- plugin callbacks now draw their stuff until run/cancel is executed (so we
  manipulate the scene with the additional data displayed)
- made plugin code much shorter
- simpler defaults for StreamLines, CutGrid and Evaluate

draw points instead of grid

add callbacks to draw grid + fix interval definition

add callbacks to draw grid

new Plugin(Probe) to query the value of a view at a single point

new Plugin(Remove) to selectively remove parts of a view (e.g., all
the text strings, all the scalar lines, etc.). Very useful to clean up
maps after cuts, or to reset comment strings.

- new alternative Draw_String function taking a "style" argument (used
  only for font size at the moment)
- new Plugin(Annotate) to add simple text strings to a view

We cannot use _quad as a class name: gcc 2.95 uses it internally

fixed "gcc -pedantic" warnings

- Replaced the general eigenvalue solver with a version from Laurent's
MatLib code (a bit more stable thanks to floating point checks with
adjustable tolerance)

- Added a solver for symmetric matrices (again from Laurent. Thanks, dude!)

- Added a small driver for 3x3 matrices, that selects the appropriate
solver (sym/nonsym) automatically

add an elementFactory to simplify the tests + new "getNode" fcts

typo

renamed Plugin(PrincipalStresses) into Plugin(Eigenvectors) + provide the
option to disable the scaling by the associated eigenvalues

typo

fix div. by zero

Don't call EigSort automatically in EigSolve, as it could screw up the
ordering of complex eigenvectors

msg

make the EigSolve interface allow for the solution of eigenvalue problems
of arbitrary size (instead of limiting to 3x3)

new plugin to compute the principal values of a tensor field