docs: include section on beta samples in README (#283)

Author: yoshi-automation

packages/google-cloud-translate/samples/README.md

@@ -25,6 +25,62 @@ API is part of the larger Cloud Machine Learning API family. Samples
 Before running the samples, make sure you've followed the steps outlined in
 [Using the client library](https://github.com/googleapis/nodejs-translate#using-the-client-library).
 
+### Translate V3 Beta Samples
+
+#### Install Dependencies
+
+From the [root directory](https://github.com/googleapis/nodejs-translate) of the client library install the dependencies:
+
+```
+npm install
+```
+
+Change to the samples directory, link the google-cloud/translate library from the parent, and install its dependencies:
+
+```
+cd samples/
+npm link ../
+npm install
+```
+
+#### Run the Tests
+
+To run the tests for the entire sample, run
+
+```
+npm test
+```
+
+To run the tests for only the translate v3 samples, run
+
+```
+npm run test-v3
+```
+
+To run the tests for a single translate v3 sample, run this command, substituting FILE_NAME with the name of a valid test file.
+
+```
+./node_modules/.bin/mocha test/v3beta1/FILE_NAME
+```
+
+For example, to test the `translate_list_language_names_beta` sample, the command would be
+
+```
+./node_modules/.bin/mocha test/v3beta1/translate_list_language_names_beta.test.js
+```
+
+To run a sample directly, call the file with the `node` command and any required CLI arguments:
+
+```
+node v3beta1/FILE_NAME <CLI argument 0> <CLI argument 1>
+```
+
+For example, to run the `translate_list_codes_beta` sample, you would run the following command, substituting your project ID in place of "your_project_id"
+
+```
+node v3beta1/translate_list_codes_beta.js "your_project_id"
+```
+
 ## Samples
 
 

packages/google-cloud-translate/synth.metadata

@@ -1,19 +1,19 @@
 {
-  "updateTime": "2019-05-21T11:28:08.403550Z",
+  "updateTime": "2019-05-29T11:22:38.021811Z",
   "sources": [
     {
       "generator": {
         "name": "artman",
-        "version": "0.20.0",
-        "dockerImage": "googleapis/artman@sha256:3246adac900f4bdbd62920e80de2e5877380e44036b3feae13667ec255ebf5ec"
+        "version": "0.21.0",
+        "dockerImage": "googleapis/artman@sha256:28d4271586772b275cd3bc95cb46bd227a24d3c9048de45dccdb7f3afb0bfba9"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "32a10f69e2c9ce15bba13ab1ff928bacebb25160",
-        "internalRef": "249058354"
+        "sha": "fa15c3006e27b87a20c7a9ffbb7bbe4149c61387",
+        "internalRef": "250401304"
       }
     },
     {