doc: add geek as collaborator

Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
PR-URL: #835

Author: geek

README.md

@@ -278,6 +278,7 @@ information about the governance of the io.js project, see
 * **Aleksey Smolenchuk** ([@lxe](https://github.com/lxe)) <lxe@lxe.co>
 * **Shigeki Ohtsu** ([@shigeki](https://github.com/shigeki)) <ohtsu@iij.ad.jp>
 * **Sam Roberts** ([@sam-github](https://github.com/sam-github)) <vieuxtech@gmail.com>
+* **Wyatt Preul** ([@geek](https://github.com/geek)) <wpreul@gmail.com>
 
 Collaborators follow the [COLLABORATOR_GUIDE.md](./COLLABORATOR_GUIDE.md) in
 maintaining the io.js project.