V0.6.6 update (#18)

* content updates for v06.6

* updated release notes

data/docs.yml

@@ -39,12 +39,18 @@ navi:
       -
         path: listen
         title: listen
+      -
+        path: message
+        title: message
       -
         path: pause
         title: pause
       -
         path: play
         title: play
+      -
+        path: rasa
+        title: rasa
       -
         path: redirect
         title: redirect
@@ -93,3 +99,13 @@ navi:
       -
         path: nodejs-sdk
         title: Introduction to the Node.js SDK
+  -
+    path: release-notes
+    title: Release Notes
+    pages:
+      -
+        path: v0.6.6
+        title: v0.6.6
+      -
+        path: v0.6.5
+        title: v0.6.5