Un-comment PWD button

README.md

@@ -113,12 +113,9 @@ This is my original blog post on FaaS from Janurary: [Functions as a Service blo
 
 A one-line script is provided to help you get started quickly. You can test-drive FaaS on Docker Swarm with a set of sample functions as defined in the provided [docker-compose.yml](https://github.com/alexellis/faas/blob/master/docker-compose.yml) file. Alternatively if you have a Kubernetes cluster you can [start here](https://github.com/alexellis/faas-netes).
 
-Use your own laptop or the free community-run Docker playground: play-with-docker.com.
+Use your own laptop or the free community-run Docker playground: play-with-docker.com (PWD) with the button below:
 
-<!--
 [![Try in PWD](https://cdn.rawgit.com/play-with-docker/stacks/cff22438/assets/images/button.png)](http://play-with-docker.com?stack=https://raw.githubusercontent.com/alexellis/faas/master/docker-compose.yml&stack_name=func)
-> This doesn't work since it won't clone the Prometheus and AlertManager config.
--->
 
 ### [Begin the TestDrive with Docker Swarm](https://github.com/alexellis/faas/blob/master/TestDrive.md)