added my data augmentation changes

[MatthewPierson90]

These are the changes I've made regarding the data augmentation.

The change in create is what I believe is the appropriate change to fix the time series error I was getting before.

I have set up roll so that it rolls over time a given number of time steps (or percent).

So roll2 (or rolls2) will roll the time step by 2, rollp25 will roll the time series by 25% of the number of time steps.