message: Core: fixed convergence bug.
  If a converged configuration was used as input in LLG with Temperature or Spin Current, the image was incorrectly determined converged, as the force shows the value zero. The Force_Converged method now checks this.
diff: @@ -60,6 +60,11 @@ namespace Engine
  bool Method_LLG::Force_Converged()
  {
  + for (unsigned int img = 0; img < systems.size(); ++img)
  + {
  + if (this->systems[img]->llg_parameters->temperature > 0 || this->systems[img]->llg_parameters->stt_magnitude > 0)
  + return false;
  + }
  // Check if all images converged
  return std::all_of(this->force_converged.begin(),
  this->force_converged.end(),
  