continue templating VectorTools; introduce templates to MatrixTools and DoFTools

continue templating VectorTools; introduce templates to MatrixTools and DoFTools

(i) drop the typedef FunctionMap from (hp::)DoFHandler and template n_boundary_dofs().
 Fix a few places where it was used.
(ii) template make_boundary_sparsity_pattern(...,FunctionMap,...)
(iii) new templates in MatrixCreator::
  create_mass_matrix(), create_boundary_mass_matrix(),
  apply_boundary_values() and local_apply_boundary_values().
(iv) number templates in VectorTools::
  interpolate_boundary_values(), project_boundary_values(),
(v) instantiate ConstraintMatrix::distribute_local_to_global for SparseMatrix<long double>