Use a subfolder in the release bucket

The tekton release bucket shall host releases for all relevant
tekton projects. Pipeline should use its own dedicated subfolder.

Closes tektoncd/plumbing#57

docs/install.md

@@ -51,11 +51,11 @@ To add the Tekton Pipelines component to an existing cluster:
    and its dependencies:
 
    ```bash
-   kubectl apply --filename https://storage.googleapis.com/tekton-releases/latest/release.yaml
+   kubectl apply --filename https://storage.googleapis.com/tekton-releases/pipeline/latest/release.yaml
    ```
 
    _(Previous versions will be available at `previous/$VERSION_NUMBER`, e.g.
-   https://storage.googleapis.com/tekton-releases/previous/0.2.0/release.yaml.)_
+   https://storage.googleapis.com/tekton-releases/pipeline/previous/0.2.0/release.yaml.)_
 
 1. Run the
    [`kubectl get`](https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands#get)

tekton/resources.yaml

@@ -20,7 +20,7 @@ spec:
    - name: type
      value: gcs
    - name: location
-     value: gs://tekton-releases
+     value: gs://tekton-releases/pipeline
    - name: dir
      value: "y"
 ---
@@ -176,4 +176,4 @@ spec:
   type: image
   params:
     - name: url
-      value: vendor/github.com/googlecloudplatform/cloud-builders/gcs-fetcher/cmd/gcs-fetcher # Registry is provided via parameter, this is a hack see #569
+      value: vendor/github.com/googlecloudplatform/cloud-builders/gcs-fetcher/cmd/gcs-fetcher # Registry is provided via parameter, this is a hack see #569