README.md in google-api-client-0.34.1 vs README.md in google-api-client-0.35.0

@@ -8,16 +8,41 @@
 
 ## Migrating from 0.8.x
 
 See [MIGRATING](MIGRATING.md) for additional details on how to migrate to the latest version.
 
+## Documentation
+
+Learn how to use the Google API Client Library for Ruby with these guides:
+
+### Usage Guides
+
+- [Getting Started](docs/getting-started.md)
+- [Installation](docs/installation.md)
+- [Auth](docs/auth.md)
+  - [API Keys](docs/api-keys.md)
+  - [OAuth 2.0](docs/oauth.md)
+  - [OAuth 2.0 for Web Server Applications](docs/oauth-web.md)
+  - [OAuth 2.0 for Installed Applications](docs/oauth-installed.md)
+  - [OAuth 2.0 for Server to Server Applications](docs/oauth-server.md)
+  - [Client Secrets](docs/client-secrets.md)
+- How to...
+  - [Use Logging](docs/logging.md)
+  - [Upload Media](docs/media-upload.md)
+  - [Use Pagination](docs/pagination.md)
+  - [Improve Performance](docs/performance.md)
+
+### Reference Documentation
+
+- Reference documentation for [google-api-client](https://googleapis.dev/ruby/google-api-client/latest/index.html).
+
 ## Installation
 
 Add this line to your application's Gemfile:
 
 ```ruby
-gem 'google-api-client', '~> 0.11'
+gem 'google-api-client', '~> 0.34'
 
 ```
 
 And then execute:
 
@@ -51,9 +76,32 @@
 metadata = drive.insert_file(metadata, upload_source: 'test.txt', content_type: 'text/plain')
 
 # Download a file
 drive.get_file(metadata.id, download_dest: '/tmp/myfile.txt')
 ```
+
+An example to use the Content API (Google Merchant Center)
+
+```ruby
+require 'google/apis/content_v2'
+require 'googleauth' # https://github.com/googleapis/google-auth-library-ruby
+
+Content = Google::Apis::ContentV2 # Alias the module
+content = Content::ShoppingContentService.new
+
+scope = 'https://www.googleapis.com/auth/content'
+merchant_id = # Merchant ID found on dashboard
+
+content.authorization = Google::Auth::ServiceAccountCredentials.make_creds(
+  json_key_io: File.open('./content-api-key.json'),
+  scope: scope)
+
+content.authorization.fetch_access_token!
+# Service methods: https://googleapis.dev/ruby/google-api-client/latest/Google/Apis/ContentV2/ShoppingContentService.html
+content.list_datafeeds(merchant_id) # Returns Google::Apis::ContentV2::ListDatafeedsResponse
+
+```
+
 ### Naming conventions vs JSON representation
 
 Object properties in the ruby client use the standard ruby convention for naming -- snake_case. This differs from the underlying JSON representation which typically uses camelCase for properties. There are a few notable exceptions to this rule:
 
 * For properties that are defined as hashes with user-defined keys, no translation is performed on the key.