Fix the examples

Moves `docker-compose.yaml` to `docker-compose-counter.yaml` and
replaces the default docker-compose.yaml with the example from the
Kompose.io website.

We also rename each file from yml to yaml.

As well as do some slight modifications / formatting to
docker-compose-bundle.dab

examples/docker-compose-counter.yaml

@@ -0,0 +1,10 @@
+web:
+  image: tuna/docker-counter23
+  ports:
+    - "5000:5000"
+  links:
+    - redis
+redis:
+  image: redis:3.0
+  ports:
+    - "6379"