[newton] add method setParameters to read the configuration from a ParameterTree
[doc] move all ordering classes to the doxygen group ordering
[doc] cleanup up naming an hierarchy of doxygen groups
[doc] cleanup doxygen comments related to the grop definitions of time stepping schemes
[doc] make doxygen group PolynomialBasis a subgroup of FiniteElementMap
[doc] add BDM to the FiniteElementMap group
[doc] remove group defiition from finitelementmap.hh
[doc] untabify finiteelementmap.hh
[doc] add documentation about the "new" size methods in the FiniteElementMap interface