KeyError: 'y' in train_risk_slim.py

[nathandxn]

There is an issue with the y = data['y'] definition

[nickalewis]

Hey, nathandxn, I think the issue might be that the y should be capitalized. So instead of 'y', it should be 'Y'

[nathandxn]

@nickalewis correct, I made that change on my end to get it working. I made a PR to update in the project: #15