Added notice of new Beta Ruby SDK.

Author: sseaman

README.md

@@ -1,3 +1,4 @@
+
 Square Connect Ruby SDKs [![Build Status](https://travis-ci.org/square/connect-ruby-sdk.svg?branch=master)](https://travis-ci.org/square/connect-ruby-sdk)[![Gem Version](https://badge.fury.io/rb/square_connect.svg)](https://badge.fury.io/rb/square_connect)
 ==================
 
@@ -15,7 +16,16 @@ This SDK is automatically generated by the [Swagger Codegen](https://github.com/
 
 For more information, please visit [https://squareup.com/developers](https://squareup.com/developers)
 
-## Installation
+---
+## NOTICE: New Beta Ruby SDK Availability
+Square is pleased to announce early access to the beta release of **square.rb**, the new Square Ruby SDK gem. The new **square.rb** gem lets you take payments and run a business with Square APIs including Catalog, Customers, Employees, Inventory, Labor, Locations, Orders, and more. This new gem will eventually replace the square_connect gem and this repo.
+
+You can read more about the release in our [blog post](https://developer.squareup.com/blog/announcing-square's-new-ruby-sdk/), or check out the new Square Ruby SDK gem on [GitHub](https://github.com/square/square-ruby-sdk#readme). Or just give **square.rb** a try! You can install the gem from your terminal with the command:
+```ruby
+gem install square.rb
+```
+---
+## Installation of Square Connect Ruby SDK
 
 ### Option1: RubyGems
 The Ruby SDK is published as a gem. Simply run: