Simplify reference to PWD in intro slides

README.md

@@ -76,9 +76,6 @@ a few other contributors. It is actively maintained.
 
 ## Repository structure
 
-- [autotest](autotest/)
-  - Semi-automated testing system to check that all the exercises
-    in the slides work properly.
 - [bin](bin/)
   - A few helper scripts that you can safely ignore for now.
 - [dockercoins](dockercoins/)

slides/common/intro.md

@@ -35,10 +35,9 @@ class: self-paced
   <br/>you will be given specific instructions to access your cluster
 
 - If you are doing this on your own:
-  <br/>you can use
-  [Play-With-Docker](http://www.play-with-docker.com/) and
-  read [these instructions](https://github.com/jpetazzo/container.training#using-play-with-docker) for extra
-  details
+  <br/>the first chapter will give you various options like
+  [Play-With-Docker](http://www.play-with-docker.com/)
+  to get your own cluster
 
 ---