Modifying ScreenLogger to optionally not output color codes (#56)

* Modifying ScreenLogger to not output color when configured by new CLI parameter

rl_coach/coach.py

@@ -408,6 +408,9 @@ def main():
                         help="(flag) TensorFlow verbosity level",
                         default=3,
                         type=int)
+    parser.add_argument('--nocolor',
+                        help="(flag) Turn off color-codes in screen logging.  Ascii text only",
+                        action='store_true')
     parser.add_argument('-s', '--checkpoint_save_secs',
                         help="(int) Time in seconds between saving checkpoints of the model.",
                         default=None,
@@ -495,6 +498,9 @@ def main():
 
     args = parse_arguments(parser)
 
+    if args.nocolor:
+        screen.set_use_colors(False)
+
     graph_manager = get_graph_manager_from_args(args)
 
     if args.distributed_coach and not graph_manager.agent_params.algorithm.distributed_coach_synchronization_type: