Add files tos support maintaining context.

Author: Marc Gelormino

articles/machine-learning/service/breadcrumb/toc.yml

@@ -0,0 +1,15 @@
+- name: Azure
+  tocHref: /azure/
+  topicHref: /azure/index
+  items:
+  - name: Machine Learning
+    tocHref: /azure/open-datasets/
+    topicHref: /azure/machine-learning/
+    items:
+    - name: Service
+      tocHref: /azure/open-datasets/
+      topicHref: /azure/machine-learning/service/
+      items: 
+      - name: Open Datasets
+        tocHref: /azure/open-datasets/sample
+        topicHref: /azure/machine-learning/service/

articles/machine-learning/service/context/kv-context.yml

@@ -0,0 +1,5 @@
+
+### YamlMime:ContextObject
+brand: azure
+breadcrumb_path: ../breadcrumb/toc.yml
+toc_rel: ../toc.yml