README.md in coach-1.0.0 vs README.md in coach-2.0.0

@@ -1,9 +1,9 @@
 # Coach
 
 [![Gem Version](https://badge.fury.io/rb/coach.svg)](http://badge.fury.io/rb/coach)
-[![Build Status](https://travis-ci.org/gocardless/coach.svg?branch=master)](https://travis-ci.org/gocardless/coach)
+[![CircleCI](https://circleci.com/gh/gocardless/coach.svg?style=svg)](https://circleci.com/gh/gocardless/coach)
 [![Code Climate](https://codeclimate.com/github/gocardless/coach.svg)](https://codeclimate.com/github/gocardless/coach)
 
 Coach improves your controller code by encouraging:
 
 - **Modularity** - No more tangled `before_filter`'s and interdependent concerns. Build
@@ -11,18 +11,20 @@
 - **Guarantees** - Work with a simple `provide`/`require` interface to guarantee that your
   middlewares load data in the right order when you first boot your app.
 - **Testability** - Test each middleware in isolation, with effortless mocking of test
   data and natural RSpec matchers.
 
+For our policy on compatibility with Ruby and Rails versions, see [COMPATIBILITY.md](docs/COMPATIBILITY.md).
+
 # Installation
 
 To get started, just add Coach to your `Gemfile`, and then run `bundle`:
 
 ```ruby
 gem 'coach'
 ```
 
-Coach works with Ruby versions 2.2 and onwards.
+Coach works with Ruby versions 2.4 and onwards.
 
 ## Coach by example
 
 The best way to see the benefits of Coach is with a demonstration.