add test version of fourier model

bof

- polished mesh option strings in gui
- merged modified extrusion patch from <mi.benham@free.fr>

split mesh->general tab into 2 tabs ("general" and "advanced")

_L,_H -> _LL,_HH

depend + cleanup includes

- new version of MED IO (Pascale Noyret)
- moved OCCInternals class into separate header for Salome plugin (Pascale Noyret)

cleanup

1D transfinite mesh algo was completely broken.

sigh.

increase size of bbox for 2d algo (cf example)

- fix include for box version
- don't optmize BDS.cpp for now: it crashes with gcc 4.1 (e.g. on debian etch)

tCircle and tCoherence were removed from the lexer? WTF?

- only save mesh vertices that are used by elements

- fix warnings + indent + memory leaks in new Field classes

- temporary fix to avoid crashes in new field manager when post-pro
  views are reloaded or removed at run-time

Jonathan

background mesh. I've still to write some fields sub-class, but backward
compatibility should be ok now.
Jonathan
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we use the Lawson algorithm for 3D surface and the smallest circumsphere
of the triangles as circumcircle.

JFR

consolidate all SVector/SPoint/SBoundinBox into header files only
+ fixed little put in SPoint3

compatibility when extruding multiple entities at once)

fix readUNV (did not recogmnize "Rod", etc. as beam elements)

patch for Debian folks (gcc 4.3)

fix pb when choosing solver exe interactively