LinguaLeo/expert-sender-api — pull request #9 by MacDada (2014-04-22 20:32:31+00:00)
Title: Add user to list attributes

That should make all the attributes [listed in the docs](https://sites.google.com/a/expertsender.com/api-documentation/methods/subscribers/add-subscriber#TOC-Request-data-format) available to use.

It already contains https://github.com/LinguaLeo/expert-sender-api/pull/8