fixed some parametrization stuff / mumps interface fixed too / frontal algo works nicely with parametrizations

discreteDiskFace: improvement of the fix for a one-to-one linear mapping

discreteDiskFace: Higher order nodes of the Dirichlet BC's are not mapped on the circle, there are barycenter of the boundary edge.

The mesher cannot be used yet, but the parametrization does work !
Todo: partioning for large aspect ratio, check if each part is connected, make discreteEdges (for mesher)

are not affected by node repositioning 

Improvement of the function space (inline)

Meshing does not work.

connected new reparametrization