Delete previous idb and upgrade for v3#1112

Merged

gauntface merged 3 commits intov3from precaching-version

Dec 8, 2017

+8-1

Commits on Dec 8, 2017

Delete previous idb and upgrade for v3
Matt Gaunt
committed
Less than 2, delete previous object store
Matt Gaunt
committed
Handle no object store
Matt Gaunt
committed