Adds init/db step that performs deepdive-initdb
Adds init/db step that performs deepdive-initdb

zifeishan/deepdive,shahin/deepdive,HazyResearch/deepdive,HazyResearch/deepdive,sky-xu/deepdive,zifeishan/deepdive,zifeishan/deepdive,HazyResearch/deepdive,shahin/deepdive,sky-xu/deepdive,HazyResearch/deepdive,zifeishan/deepdive,zifeishan/deepdive