removed obsolete compilation warning

automatisation of lex and yacc compilation of the parser (Gmsh.y, Gmsh.l)

Adding GenericVertex, GenericEdge, GenericFace and GenericRegion: derived classes from GEntity (as OCCVertex, etc. for instance), providing a generic interface to any other modeler through the use of callbacks functions to be given by the user...

useful for remapping a mesh onto a (slightly modified) CAD, for sensitivity analyses

We should really clean up the mess that "reparamOnXXX" has become. Introducing one more horrible "haveParametrization()" member function to add to the general insanity :-)

ENABLE_SWIG has been replaced by ENABLE_WRAP_PYHTON and ENABLE_WRAP_JAVA.

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

physical tags, partitioning, second order prisms

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Changed the return type of GetOBB from SOrientedBoundingBox* to SOrientedBoundingBox

Emilie: added functions to remesh a volume

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

- fixed missing getShapeFunction/getGradShapeFunction + return all sf
  at once so we can implement MElement in term of these consistently
  (w or w/o FunctionSpace)

- can now merge multiple meshes and remove duplicate mesh vertices
  (useful e.g. when merging several STLs)

- added easy interface to create model-based postpro datasets on the
  fly + use this for mesh quality stats