Update Vision samples to be easier to read. Update dependencies.

Author: jmdobry

package.json

@@ -82,9 +82,9 @@
     "@google-cloud/pubsub": "0.7.0",
     "@google-cloud/resource": "0.5.1",
     "@google-cloud/speech": "0.6.0",
-    "@google-cloud/storage": "0.6.1",
+    "@google-cloud/storage": "0.7.0",
     "@google-cloud/translate": "0.6.0",
-    "@google-cloud/vision": "0.7.0",
+    "@google-cloud/vision": "0.8.0",
     "@google/cloud-debug": "0.9.1",
     "@google/cloud-trace": "0.5.10",
     "async": "2.1.4",