Add a maintainers file

This location is idiomatic to Linux Kernel people. Let's redirect them to the
place we keep this information.

Change-Id: I66fed1fc4990b2e9ff95dc197da752e1ec51c4e8

MAINTAINERS

@@ -0,0 +1,17 @@
+Nova doesn't have maintainers in the same way as the Linux Kernel. However,
+we do have sub-teams who maintain parts of Nova and a series of nominated
+"czars" to deal with cross functional tasks.
+
+Each of these sub-teams and roles are documented on our wiki at
+https://wiki.openstack.org/wiki/Nova
+
+You can find helpful contacts for many parts of our code repository at
+https://wiki.openstack.org/wiki/Nova#Developer_Contacts
+
+We also have a page which documents tips and mentoring opportunities for new
+Nova developers at https://wiki.openstack.org/wiki/Nova/Mentoring
+
+Finally, you should also check out our developer reference at
+http://docs.openstack.org/developer/nova/devref/
+
+Thanks for your interest in Nova, please come again!