fashion-mnist example (#180)

* fashion mnist example

* fix from review

mnist/README.md

@@ -14,10 +14,16 @@ Run the example with:
 python main.py
 ```
 
-By default the example runs on the CPU. To run on the GPU, use: 
+By default, the example runs on the CPU. To run on the GPU, use: 
 
 ```
 python main.py --gpu
 ```
 
+For a full list of options run:
+
+```
+python main.py --help
+```
+
 To run the PyTorch or Jax examples install the respective framework.