[setup] Change setup so that it can be re-run.

Summary: The setup script now has a few checks in it so that it can safely be re-run.

Test Plan: start using the setup.sh script to upgrade when requirements or database schema changes

Reviewers: spang

Differential Revision: https://review.inboxapp.com/D282
[monocle/accounts] Slight re-styling, add support to stop / start account sync.

Summary: Add support for monocle to stop and restart a sync

Test Plan: Run monocle, stop an account from syncing, re-start an account sync

Reviewers: kav-ya

Differential Revision: https://review.inboxapp.com/D285
[monocle/accounts] Slight re-styling, add support to stop / start account sync.

Summary: Add support for monocle to stop and restart a sync

Test Plan: Run monocle, stop an account from syncing, re-start an account sync

Reviewers: kav-ya

Reviewed By: kav-ya

Differential Revision: https://review.inboxapp.com/D285