Batches data source#1

Merged

icanzilb merged 8 commits intomasterfrom

marin/batcheddatasource

Aug 30, 2019

Commits on Aug 25, 2019

batched data source draft
icanzilb
committed

Commits on Aug 26, 2019

added new demo for custom batcher
icanzilb
committed

Commits on Aug 27, 2019

adds readme todo
icanzilb
committed

Commits on Aug 29, 2019

Commits on Aug 30, 2019