Add the 'accounting_code' attribute to AddOns and Transactions

Signed-off-by: Evan Owen <kainosnoema@gmail.com>
Add missing API methods on addon, account_list
Merge pull request #43 from recurly/missing-api-methods

Add missing API methods on addon, account_list
Rename function to getClosed
Include empty arrays

Assigning subscription add-ons an empty array (to remove add-ons) was
broken. This fixes it.

Signed-off-by: Stephen Celis <stephen@stephencelis.com>
Support subdomain configuration

Configuring the client by subdomain is required from now.

Signed-off-by: Stephen Celis <stephen@stephencelis.com>
Merge pull request #1 from recurly/route-api-by-subdomain

Support subdomain configuration
Omit XML element for empty currency lists

Fixes: https://support.recurly.com/tickets/23622
Merge pull request #2 from recurly/empty_currency_list

Omit XML element for empty currency lists
Basic composer.json