Validation mixup

[mbazzani]

• Adds mixup to validation
• Rounds mixup targets up (what interval do we want? current default is 0.5)

[mbazzani]

The type issues aint in my code

[mbazzani]

TODO: Decide whether to do fancier clip mixing ratios

[benjamin-cates]

This function isn't working for me

[benjamin-cates]

Your definition of sample does not work if two elements have the same probability. Also hyperbolic has the same problem if there are duplicate integers. Perhaps it would be much better to have Dict[int,float] instead of Dict[float,int]. Although you would have to manage adding duplicate keys instead of overwriting. Might have to be List[Tuple[float,int]]