Add a central simple getting started guide with kubernetes guide.

Point several getting started guides at this doc.

docs/design/simple-rolling-update.md

@@ -57,7 +57,6 @@ then ```foo-next``` is synthesized using the pattern ```<controller-name>-<hash-
 #### Initialization
    * If ```foo``` and ```foo-next``` do not exist:
       * Exit, and indicate an error to the user, that the specified controller doesn't exist.
-      * Goto Rollout
    * If ```foo``` exists, but ```foo-next``` does not:
       * Create ```foo-next``` populate it with the ```v2``` image, set ```desired-replicas``` to ```foo.Spec.Replicas```
       * Goto Rollout