bigquery/language/logging/prediction/vision: decouple packages (#1531)

* bigquery/language/logging/prediction/vision: decouple packages

* tests: allow more time for docs tests to run

* add vision test

* resort dependencies like npm does

Author: stephenplusplus

package.json

@@ -50,11 +50,11 @@
     "datastore"
   ],
   "dependencies": {
+    "@google-cloud/common": "^0.2.0",
     "arrify": "^1.0.0",
     "concat-stream": "^1.5.0",
     "create-error-class": "^2.0.1",
     "extend": "^3.0.0",
-    "@google-cloud/common": "^0.2.0",
     "is": "^3.0.1",
     "lodash.flatten": "^4.2.0",
     "modelo": "^4.2.0",