Namespace everything that wasn't already namespaced
Explicitly require spree/shipment_notice because it isn't autoloading in production
Merge pull request #1 from CultConspiracy/master

Fix namespacing issues
Adds deployment instructions for heroku to README
Updates README formatting
Fixes problem with exporting shipments from a country that does not have states
Merge branch 'master' of github.com:DynamoMTL/spree_shipstation