message: Adding sample runs and fixing logic for default run
diff: // Snake Miniapp: Model of the Rubik's Snake_TM Puzzle
  // ----------------------------------------------------
  //
  +// This miniapp provides a light-hearted example of mesh manipulation and
  +// GLVis integration.
  +//
  +// Compile with: make snake
  +//
  +// Sample runs: snake
  +// snake -c 0
  +//
  #include "mfem.hpp"
  #include <fstream>
  @@ -169,7 +177,7 @@ int main(int argc, char *argv[])
  << "palette 22\n" << "valuerange -1.5 1\n"
  << "autoscale off\n" << flush;
  - if (anim)
  + if (cfg >= 0 && anim)
  {
  sol_sock << "pause\n" << flush;
  cout << "GLVis visualization paused."
  @@ -185,11 +193,12 @@ int main(int argc, char *argv[])
  }
  sol_sock << flush;
  }
  - sol_sock << "autoscale on\n" << "valuerange -1.5 1\n" << flush;
  }
  + sol_sock << "autoscale on\n" << "valuerange -1.5 1\n" << flush;
  }
  // Output the resulting mesh to a file
  + if (cfg >= 0)
  {
  ostringstream oss;
  oss << "snake-c" << cfg << ".mesh";
  