Change preprocess files naming to avoid cache

[peilingjiang]

Avoid models trained all become the same as the first one when running a continues training script for multiple models. Also adjust hyperparameter names in README to make it easier to understand.

[peilingjiang]

18

[shiffman]

Fantastic, thank you for this @peilingjiang! Do you think it would make more sense to write these files out to a different directory and not the input one?

[peilingjiang]

@shiffman Thank you for pointing that out! I've changed the directory storing the processed files and now they'll be stored in a new folder in the root directory.

[shiffman]

Wonderful, thank you!