Add postgres datastore type#5403

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JamesChristie wants to merge 2 commits intoipfs:masterfrom vulcanize:postgres

+155-1

Commits on Jan 24, 2019

Add postgres datastore type

JamesChristie
authored and
Stebalien
committed
move postgres to plugins; test in head context with updated dependencies; undo gx releases; address feedback; gx hashes will need to be updated once go-ipfs-config PR is merged and gx released"

i-norden
authored and
Stebalien
committed