- fixed MED node ordering
- polished 64 bit Cocoa Mac OS X FLTK version
- updated copyright

unified class Incompressinle for 2d and 3D problems

Several things for multi-constraint mesh partitioning + start circumscribed circle of MElement (need to be finished)

Fracture can be prescribed by a different law on interface
Explicit system is implemented with petsc vector operations

AnalyseCurvedMesh development (works for triangle and tetra but is not yet optimized and is still incomplete, edit PluginManager.cpp to activate the plugin)

physical tags, partitioning, second order prisms

* issue error for zero volume elements in FEA export
* reset element number between 2D/3D in FEA export

Compute radius of the inscribed circle within an element. Done for Mquadrangle, MTriangle, Mtetrahedron

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- renamed functionSpace into polynomialBasis (functionSpace will be much higher level)

- invert #define logic (HAVE_MESH, HAVE_POST, HAVE_SOLVER, ... instead of HAVE_NO_MESH,
  HAVE_NO_POST, HAVE_NO_SOLVER)

renamed most gmsh* classes

too hard to maintain