message: added stopping criterion
diff: @@ -93,7 +93,7 @@ impl<'a> ArgminSolver<'a> for Landweber<'a> {
  /// Indicates whether any of the stopping criteria are met
  fn terminate(&self) -> bool {
  - false
  + self.state.iter >= self.max_iters
  }
  /// Run Landweber method
  