Shopify/active_shipping — pull request #195 by garethson (2014-10-21 18:40:53+00:00)
Title: Refactor determining rate_value from a reponse node

Refactors fetching the rate value from a USPS response node. Allows flexibility in pulling this out for other systems. Instead of https://github.com/Shopify/active_shipping/pull/192/files.

cc @RichardBlair @jnormore