- new GetEnv and GetString functions

Add FullDg formulation
Add Stress and InternalPoint (development)

bindings for GmshMessages and full support for bindings of static functions (eg Msg:getCommRank() == Msg.getCommRank() == Msg():getCommRank())

Propose to automatically create .geo file with a Merge command when
trying to append a scripting command to a non-geo file. Got the idea 
after the discussion with Robert Bou. (This is better than scripting
the Merge command IMHO.)

- more work on SLEPc eigensolver integration

add support for petsc solvers

better gestion of remote messages ("a la getdp")

- moved GUI to FlGui + added experimental QGui to test Qt

- fixed most MSVC and gcc compiler warnings

- converted some remaining tabs to whitespace (that's why the patch is
  so large; please try to remember to indent with 2 spaces and not
  tabs when you commit stuff to CVS)

- merged modified patch from Konstantinos Poulios to allow saving
  physical/partition as element tags in mesh formats that don't
  support them natively

Added "File->Save Options" to automatically save options for the
current project (same name + appended ".opt")

OpenProject will detect the ".opt" and will load the options
automatically if available.

Adapted from an original idea and patch from <jiri.hnidek@tul.cz>.

Thanks Jiri!

HAVE_XXX defines.

This fixes three longstanding problems:

- the API was hard to use because some headers had HAVE_XXX ifdefs, so
  that cient codes had to know how the lib was compiled to compile
  themselves

- we had to do make clean after each ./configure, which erased too
  much (e.g. most of contrib)

- make depend could include unwanted stuff since it redefined FLAGS

- fix bb computation to avoid model jumping around when adding points in z=0 plane
- pass interpol matrices as ref

There's no new functionality for now: PLEASE TEST THAT EVERYTHING
WORKS AS IT USED TO BEFORE.

vsnprintf unknown in visual 2003

things down when you have many many surfaces)
- fix out of bound acces in transfinite callback when selecting > 100
entities

- removed every "throw;", i.e., every throw that did not throw an actual exception.
  throw wihout args should ONLY be used in a catch{} to re-throw the same exception
  (for it to be handled in another catch clause)

- introduced GmshMessage callback class so that clients can easily implement
  their own message handling (see example in driverOCC.cpp)

- merge OCC64 patch from Jose Paulo Moitinho de Almeida

* implemented first rough draft of VTK mesh writer

  did in high
* added mesh generation error log summary
* removed Parallel subdir (this is now handled by the message class)
* removed Box subdir and consolidated batch processing in a single
  routine
* made List_T into a class
* reduced dependencies in Pview*.h so we can eventually add the post-pro
  interface to the public API