[WIP] add get / store preprocessing hooks functionality#209

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gkang2018 wants to merge 9 commits intomasterfrom 207-GK-preprocessingHooks

+21,755-12,298

Commits on Aug 3, 2020

Commits on Aug 5, 2020

swap hooks and api functions
gkang2018
committed

Commits on Aug 10, 2020

add mongoose functions to get/store preprocessing demo hooks
gkang2018
committed

Commits on Aug 13, 2020

refactor average hooks
gkang2018
committed

Commits on Aug 14, 2020

add read/write to json in client for preprocessing
gkang2018
committed

Commits on Aug 17, 2020

Commits on Aug 18, 2020

fix delete preprocessing table and delete commented code
gkang2018
committed