Shuttle ‑ Sync with Etsy

Degraded service after update.

Feature-wise, this is the best Etsy-Shopify integration out there. A couple of caveats:
- Company customer service is based in India, so you can expect off-hours support or lag in responses.
- Etsy now doesn't let you add shipping addresses to orders, nor can you update orders as shipped in Etsy, so there are manual steps involved.
- Latest "native shopify" update is crazy laggy, sometimes interface doesn't load at all, and double-imported some orders.