Modification of Q-Table notebook + adding the functionnality of using it to play frozenlake

[simoninithomas]

Hi ! Thanks for your articles about RL I really enjoyed them. In the notebook about Q-Table, I've made some modifications:

• I've added some explanations (Q algo pseudocode), comments
• The functionality of using our Q-table to play FrozenLake I hope it can help other students