Add "Glance Contributors " to top-5 wanted list

As per the discussion on the ML, I've added Glance to the list of top-5
wanted list.

http://lists.openstack.org/pipermail/openstack-dev/2017-June/118173.html

Change-Id: I6d71c1841e54fe91abea4ab8b5d4594a222edac5

reference/top-5-help-wanted.rst

@@ -48,3 +48,32 @@ Interested? Contact the Documentation PTL (asettle) or the TC sponsor for
 this item (dhellmann).
 
 .. _`plan`: https://review.openstack.org/#/c/472275/
+
+
+2. Glance Contributors
+======================
+
+`Glance`_ is a service to manage images for OpenStack clouds. It's one of the
+early projects in OpenStack and it's deployed in almost every OpenStack cloud.
+Without Glance, Nova can't boot instances.
+
+Glance is struggling to find new contributors that would be willing to provide
+reviews, to work on bugs or to work on new features. This struggle started as a
+result of the latest lay-offs that happened at the end of 2016 and beginning of
+2017.
+
+Glance is a great project to ramp up on OpenStack and it's a great project for
+developers regardless of their experience. Glance has welcomed interns, junior
+developers, and more senior developers. In every case, it's a great way to grow
+and contribute to OpenStack.
+
+Glance is a critical project in OpenStack. Contributions to the future of the
+image registry are essential to the stability of OpenStack. More importantly,
+Glance is not "done". There's significant technical debt that needs to be taken
+care off and several features that can be implemented.
+
+Interested? Join the Glance IRC channel (#openstack-glance) or reach out to the
+Glance PTL (rosmaita), the TC sponsor for this item (flaper87) or starting a new
+email thread on the ML using the tag `[glance]`.
+
+.. _`Glance`: https://governance.openstack.org/tc/reference/projects/glance.html