Enhances usability of interpolate() with BoundaryUID argument
The commit adds a member function interpolate( ValueType constant, uint_t level, BoundaryUID boundaryUID ) to the following functions: - P1Function a.k.a. VertexDoFFunction - EdgeDoFFunction - P2Function - CSFVectorFunction Additionally we also add the following two variants to CSFVectorFunction, which allow to interpolate the components by different constants: interpolate( const std::vector< valueType >&, size_t, DoFType ) interpolate( const std::vector< valueType >&, size_t, BoundaryUID )