Add MAINTAINERS file

MAINTAINERS.md

+# Maintainers
+
+This file lists how the Omnibus project is maintained. When making changes
+to the system, this file tells you who needs to review your patch - you need a
+simple majority of maintainers for the relevant subsystems to provide a :+1: on
+your pull request. Additionally, you need to not receive a veto from a
+Lieutenant or the Project Lead.
+
+Check out
+[How Chef is Maintained](https://github.com/chef/chef-rfc/blob/master/rfc030-maintenance-policy.md#how-the-project-is-maintained)
+for details on the process, how to become a maintainer, lieutenant, or the
+project lead.
+
+## Project Lead
+
+* [Seth Chisamore](https://github.com/schisamo)
+
+## Lieutenants
+
+* [Scott Hain](https://github.com/scotthain)
+* [Steven Danna](https://github.com/stevendanna)
+* [Yvonne Lam](http://github.com/yzl)
+
+## Maintainers
+
+* [Daniel DeLeo](https://github.com/danielsdeleo)
+* [Jay Mundrawala](https://github.com/jdmundrawala)
+* [Lamont Granquist](https://github.com/lamont-granquist)