Change tensorboard command to work on Windows

Author: awjuliani

python/README.md

@@ -39,7 +39,7 @@ Then navigate to `localhost:8888` to access each training notebook.
 
 To monitor training progress, run the following from the root directory of this repo:
 
-`tensorboard --logdir='./summaries'`
+`tensorboard --logdir=summaries`
 
 Then navigate to `localhost:6006` to monitor progress with Tensorboard.