Some notes for improving radlab experience

[ShvetankPrakash]

Based on our conversation and meeting @proppy I am just jotting down some ideas for additions to radlab that could be helpful/useful so that we have in case for the future:

1. Have a set of 3 primary template notebooks for users using radlab: notebook returning metrics, notebook for tuning, and notebook for viz. These templates should all be very generic for new users to plug in and play whatever they'd like but would be a good way for folks to get going fast and easy.
2. Keep everything to be modified in notebooks up front in first cells.
3. Notes/documentation about running/modifying in shell vs env could be helpful.