Initial commit of reference configuration renewal.

Initial implementation of AAdapt_MeshAdapt_Def.hpp: updateCoordinates and
supporting mods.

Added the default-false argument 'overlapped' to getSolutionField. Coordinates
must be updated for the overlapped map; hence the solution Tpetra_Vector with
overlap_map must be available. The default-false value preserves behavior for
no-arg calls.

Strengthened const-ness in a few relevant spots.
Remove some FELIX-related getters in FMDBDiscretization.

Get rid of unused methods I merged in erroneously.