[BUG] fix validation call in ripple bridge invoice
[BUG] Properly name Api::Ripple::BridgeInvoicesController
[FEATURE] Make Coinbase::Invoice.create a class method
[FEATURE] Do not require coinbase_invoice_id to create invoice
[FEATURE] Generate ripple bridge invoice  secret in controller
[FEATURE] Configure route in twitter gifts javascript app
[FEATURE] Send invoice id to coinbase for confirmation
[FEATURE] Properly handle callback from coinbase for invoices to rilpple
[FEATURE] Rename Invoice to RippleBridgeInvoice in PaymentsController
[BUG] Rename Rescue to Resque in PaymentsController
[FEATURE] Rename param recipient_twitter_username to user_id
[FEATURE] Send IOUs to a ripple address, not bitcoin address