Fixed problem with duplicated mb_reference
Added city field to client.
Fix issue #7 - Wrong return type of Modes::Item#tax Added Travis
Renamed the invoice_email method to email_invoice for sending email. Extracted examples to own file.
Fixed url for send email. New url: http://invoicexpress.com/api/invoices/email-invoice
Added rate to invoice. Experimental.
Added language field to client. API endpoint now defaults to https://%s.app.invoicexpress.com/
Removed "rquire 'pry'". Fixed it for production.
Corrected information in gem.
Fixed bug with latest version of Faraday (>0.9.0) which prevented creating a new client.
Release!