RIOT-OS/RIOT — pull request #75 by benpicco (2013-07-24 00:49:48+00:00)
Title: Allow external modules to be added to a RIOT project

Some modules might not be not part of the riot tree (oonf_api, [riot-libs](https://github.com/benpicco/riot-libs)).
Add a way to include them into the Make process.