Removed non-md files from docs. Moved doc yamls to test/fixtures.

Most of the contents of docs/ has moved to kubernetes.github.io.
Development of the docs and accompanying files has continued there, making
the copies in this repo stale. I've removed everything but the .md files
which remain to redirect old links. The .yaml config files in the docs
were used by some tests, these have been moved to test/fixtures/doc-yaml,
and can remain there to be used by tests or other purposes.

docs/devel/local-cluster/docker.md

@@ -34,7 +34,7 @@ The following instructions show you how to set up a simple, single node Kubernet
 
 Here's a diagram of what the final result will look like:
 
-![Kubernetes Single Node on Docker](../../getting-started-guides/k8s-singlenode-docker.png)
+![Kubernetes Single Node on Docker](k8s-singlenode-docker.png)
 
 ## Prerequisites
 

docs/devel/local-cluster/local.md

@@ -109,7 +109,7 @@ However you cannot view the nginx start page on localhost. To verify that nginx
 You can control the specifications of a pod via a user defined manifest, and reach nginx through your browser on the port specified therein:
 
 ```shell
-cluster/kubectl.sh create -f docs/user-guide/pod.yaml
+cluster/kubectl.sh create -f test/fixtures/doc-yaml/user-guide/pod.yaml
 ```
 
 Congratulations!