spree/spree_gateway — pull request #119 by HoyaBoya (2013-12-02 20:22:59+00:00)
Title: add support for braintree merchant account id

This adds support for Braintree merchant_account_id.

High Level Description
https://support.braintreepayments.com/customer/portal/articles/1080468-merchant-id-vs-merchant-account-id-what’s-the-difference-

API
https://www.braintreepayments.com/docs/ruby/transactions/create