Filtering dask prep
Filtering dask prep

Arrayized many filter operations
Do not show progress, len(data) is expensive
Split out filter_megarun1 and filter_rot_three
Save index of test/train on disk instead of all in memory
Allow for gam_great_GB to be missing; assume they are all 0

Karel-van-de-Plassche/QLKNN-develop,Karel-van-de-Plassche/QLKNN-develop,Karel-van-de-Plassche/QLKNN-develop