message: Adding Set/GetGridFunction methods
diff: @@ -157,6 +157,7 @@ public:
  { GridF = gf; Component = comp; }
  void SetGridFunction(GridFunction *gf) { GridF = gf; }
  + GridFunction * GetGridFunction() const { return GridF; }
  virtual double Eval(ElementTransformation &T,
  const IntegrationPoint &ip);
  @@ -336,6 +337,9 @@ private:
  public:
  VectorGridFunctionCoefficient(GridFunction *gf);
  + void SetGridFunction(GridFunction *gf) { GridFunc = gf; }
  + GridFunction * GetGridFunction() const { return GridFunc; }
  +
  virtual void Eval(Vector &V, ElementTransformation &T,
  const IntegrationPoint &ip);
  