message: Core: changed default seed from 0 to random.
  Note that the time is used as seed for std::rand, which in turn gives the seed for the llg parameters.
diff: #include <fstream>
  #include <string>
  #include <sstream>
  +#include <ctime>
  namespace Utility
  {
  @@ -296,7 +297,8 @@ namespace Utility
  bool save_output_any = true, save_output_initial = false, save_output_final = true, save_output_energy = true;
  bool save_output_archive = false, save_output_single = false;
  // PRNG Seed
  - int seed = 0;
  + std::srand(std::time(0));
  + int seed = std::rand();
  // number of iterations carried out when pressing "play" or calling "iterate"
  int n_iterations = (int)2E+6;
  // Number of iterations after which the system is logged to file
  