fix namespace clashes with CGNS headers (patch from sguzik@utias.utoronto.ca)

characteristic lenghts, that would lead to HUGE meshes (this is one
of the most common causes for erroneous bug reports on the mailing list)

- new button under the graphic window to temporarily disable mouse
  selection (speeds-up redrawing of very large models + permits to
  rotate/zoom-in a model in selection mode even when the whole screen
  is full of selectable entities--e.g. a surface mesh)

- new "lasso" selection mode (to select entities using the same kind
  of lasso as the lasso zoom: just Ctrl+click, then drag the mouse in
  selection mode; the shortcuts are the same as for the lasso zoom)

- it is now possible to unselect entities using the middle mouse button
  (only for the creation of physicals at the moment; not sure if it's
  useful in the other cases)

- new button in visibility browser to invert the current selection
  (very useful e.g. when multiple physical entities are associated
  with a given elementary entity, in order to "peel" away the model
  when adding new physicals; cf. philou)

- changed meaning of Escape shortcut (cancel lasso or toggle mouse
  selection) + restore standard fltk Escape handling for all dialog
  windows

- updated copyright string

- new mesh label mode (coordinates); all label types are now also
  available for mesh vertices

- added option in 'Print Option' dialog to disable printing of help
  strings

- added a comment string with the date when creating a new file

- new snapping grid for adding points in the GUI

Added progress message while reading .msh files (idea from Nicolas)

Instead of popping up a progress bar, I just used a Msg() call. Not
sure which is best, but this is a bit simpler..

copyright update

- new parser function GetValue("text", default_value) to query a value
  interactively in a script

- added a nice example using this (to compute slices automatically):
  demos/multislice.script

- merged ONSCREEN1 and ONSCREEN2 to minimize redraws

- fixed s->Orientations test

display the interactive messages in the graphic window (instead of the
status bar)

output solver errors+warnings in red, too

reorganized Msg() a little ("a la getdp" + colorize solver and direct messages)

Update copyright notice

Fix whitespace in copyright headers

Updated copyright

Simplify error messages in parser a bit and change msg from ERROR to WARNING for list of shapes (less annoying when doing generic transformations, e.g. of points). Noticed this thanks to Genot Jean-Sebastien <JSGenot@HerouxDevtek.com>

I hope cvs is enough clever to ged rid of ^M
genereated in windows, let's pray ...

which included commits to RCS files with non-trunk default branches.