New 0.7 API docs (#1529)

* 0.7 API docs

* create temporary eventing-contrib redirection

Author: RichieEscarez

docs/reference/build.md

@@ -1353,5 +1353,5 @@ This will override any of the template&rsquo;s steps environment variables.</p>
 <hr/>
 <p><em>
 Generated with <code>gen-crd-api-reference-docs</code>
-on git commit <code>002a41a3</code>.
+on git commit <code>0ff65541</code>.
 </em></p>

docs/reference/eventing/eventing-contrib-api.md

@@ -0,0 +1,9 @@
+---
+title: "Knative Eventing Contrib"
+linkTitle: "Eventing-contrib API"
+weight: 50
+type: "docs"
+---
+
+
+The API content for the source implementations that integrate with Knative Eventing are located in the [Knative/eventing-contrib](https://github.com/knative/eventing-contrib/tree/release-0.7/contrib) repo.