message: Doxygen comments for IterativeSolver statistics
diff: @@ -244,11 +244,30 @@ public:
  /// @name Solver statistics.
  /// These are valid after the call to Mult().
  ///@{
  +
  + /// Returns the number of iterations taken during the last call to Mult()
  int GetNumIterations() const { return final_iter; }
  + /// Returns true if the last call to Mult() converged successfully.
  bool GetConverged() const { return converged; }
  + /// @brief Returns the initial residual norm from the last call to Mult().
  + ///
  + /// This function returns the norm of the residual (or preconditioned
  + /// residual, depending on the solver), computed before the start of the
  + /// iteration.
  double GetInitialNorm() const { return initial_norm; }
  + /// @brief Returns the final residual norm after termination of the solver
  + /// during the last call to Mult().
  + ///
  + /// This function returns the norm of the residual (or preconditioned
  + /// residual, depending on the solver), corresponding to the returned
  + /// solution.
  double GetFinalNorm() const { return final_norm; }
  + /// @brief Returns the final residual norm after termination of the solver during
  + /// the last call to Mult(), divided by the initial residual norm.
  + ///
  + /// @sa GetFinalNorm(), GetInitialNorm()
  double GetFinalRelNorm() const { return final_norm / initial_norm; }
  +
  ///@}
  /// This should be called before SetOperator
  