- re-fix getNumFaceVertices for quad9
- fix vertex order in Refine()

consolidate parametricCoordinates with reparamMeshVertexOnFace

cleanup high order

- avoid dynamic_casts in Refine

- don't die silently when a read function fails
- fixed while bunch of compiler warnings

rewrote the elliptic smoother in parametric coordinates

- 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