adding back files to be reviewed

include/openmc/progress_bar.h

@@ -0,0 +1,22 @@
+#ifndef OPENMC_PROGRESSBAR_H
+#define OPENMC_PROGRESSBAR_H
+
+#include <string>
+
+class ProgressBar {
+
+public:  
+  // Constructor
+  ProgressBar();
+
+  void set_value(double val);
+  
+private:
+  std::string bar;
+  char bar_old[72] = "???% |                                                                |";
+  
+};
+
+
+#endif // OPENMC_PROGRESSBAR_H
+