Add move to object client + change datasets.mv#163

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jkeelan wants to merge 5 commits intofacultyai:masterfrom

jkeelan:object-move

Commits on Apr 30, 2020

add move to object client
Jonathan Keelan
committed
change datasets.mv to use move, not cp rm
Jonathan Keelan
committed
change test for dataset.mv
Jonathan Keelan
committed
doc string for object client move
Jonathan Keelan
committed
black
Jonathan Keelan
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