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high order smoother class added : high order meshes are guaranteed to be
valid : some elements are "un-curved" in order to ensure good value of
the distorsion mapping. P2 triangle quality estimate is robust

JF - we should really clean up the degenerated cases

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

dgshell v 1.0
lua --> python

Added automatic adaptation in advection levelset

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order 7->9 seem to be wrong : the way shape functions are
computed is maybe numerically unstable
 

* the old code has been generalized to deal with these cases
* the new "in entity" boundary layer method(s) will not create a topology of
  "boundary layer entities" anymore, so this is superfluous

recoded way to create boundary layers using explicit extrusion directions from vector post-processing view

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