README.md in test_diff-0.3.4 vs README.md in test_diff-0.4.0

@@ -1,37 +1,56 @@
 # TestDiff
 [![Build Status](https://travis-ci.org/grantspeelman/test_diff.svg?branch=master)](https://travis-ci.org/grantspeelman/test_diff)
 
-Gem that attempts to find the tests that are required to run for the changes you have made
+Gem that attempts to find the tests that are required to run for the changes you have made.
 
+## Project requirements
+
+* RSpec 2+
+* project tracked with git
+
 ## Installation
 
 Add this line to your application's Gemfile:
 
 ```ruby
-gem 'test_diff'
+gem 'test_diff', group: :test
 ```
 
 And then execute:
 
     $ bundle
 
-Or install it yourself as:
+## Rails Setup
 
-    $ gem install test_diff
+Suggest to disabled `eager_load` in `config/environments/test.rb` based on `ENV['TEST_DIFF_COVERAGE']`
+EG:
 
+```ruby
+config.eager_load = ENV['TEST_DIFF_COVERAGE'].blank?
+```
+
+Also make sure to disable `simple_cov` if you use it when `ENV['TEST_DIFF_COVERAGE']` is set
+EG:
+
+```ruby
+unless ENV['TEST_DIFF_COVERAGE']
+  require 'simplecov'
+  SimpleCov.start 'rails'
+end
+```
+
 ## Usage
 
 Building the test coverage index
 
-    $ bundle exec test_diff build_coverage spec spec/spec_helper.rb
-    $ bundle exec test_diff track_build
-    $ git add test_diff_coverage
-    $ git commit
+    $ test_diff build_coverage spec spec/spec_helper.rb
+    $ # part here to upload test_diff_coverage to a shared space, ie aws
 
 Running a test difference
 
-    $ bundle exec test_diff run_spec_diff
+    $ # part here to download test_diff_coverage from shared space, ie aws
+    $ test_diff rspec
 
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run `bin/console` for an interactive prompt that will allow you to experiment.