Add concourse notification resource to Try Matrix page

supporting-docs/projects/2016-04-30-concourse-matrix-notification-resource.md

@@ -0,0 +1,12 @@
+---
+layout: project
+title: Concourse/Matrix notification resource
+categories: projects other
+thumbnail: /docs/projects/images/concourse-ci-logo.png
+description: Post notifications from Concourse CI jobs
+author: freelock
+maturity: beta
+---
+
+# {{ page.title }}
+Create a Concourse custom resource type using [freelock/matrix-notification-resource](https://hub.docker.com/r/freelock/matrix-notification-resource/) from Docker Hub, or fork/contribute on [github](https://github.com/freelock/matrix-notification-resource)