adding string limits for billing address
removing slice for the state
should use shipping_address and not billing_address
removing BRA (country) from PagSeguro as it's options value and it only accepts BRA as value (wut?)
Merge pull request #56 from Shopify/pagseguro_limit_fix

adding string limits for billing address
iPay88 acknowledge should only requery when the status is success
Merge pull request #61 from Shopify/ipay88_requery_on_success

iPay88 acknowledge should only requery when the status is success
Map notify_url to BackendURL for iPay88
Merge pull request #63 from Shopify/ipay88_backend_url

Map notify_url to BackendURL for iPay88
Add Ipay88 notification method
Add Coinbase integration.
Fix order parsing.
Enable auto-redirect to always get return information.
PoC: Coinbase return processing
Add return test.
Rename parameter.
Revert "Rename parameter."

This reverts commit 87db691886bfdec15aacd9501a829291c60a16d8.
Rename post_params in return test.
Add return test to module tests.
Fix invalid acks