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

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

- don't use 'this->' unless you really need it
- don't use 'using namespace std'
- don't put extra ';'s everywhere
- follow the style of the rest of the code for indentation, etc.