Explicitly call with Spree namespace.
Merge pull request #15 from jdutil/stock_locations

Explicitly call with Spree namespace.
Fixes to Spree::TaxCloud#destination_address

* Refer to ::TaxCloud::Address rather than TaxCloud::Address
* taxcloud_usps_user_id.present? because it can be ""
* TaxCloud::Address is initialized with lowercase symbols
Merge pull request #18 from freerunningtechnologies/destination_address

Fixes to Spree::TaxCloud#destination_address
Fix removing items from cart when tax adjustment exists.