README.md in ember-cli-rails-0.5.6 vs README.md in ember-cli-rails-0.5.7

@@ -61,11 +61,11 @@
 ```
 
 * generate a new Ember project:
 
 ```bash
-$ ember new frontend
+$ ember new frontend --skip-git
 ```
 
 **Initializer options**
 
 - `name` - this represents the name of the Ember CLI application.
@@ -90,11 +90,11 @@
 
 Be sure that the addon's [`MAJOR` and `MINOR` version][semver] matches the gem's
 `MAJOR` and `MINOR` versions.
 
 For instance, if you're using the `0.5.x` version of the gem, specify
-`~> 0.5.0` ion in your Ember app's `package.json`:
+`~> 0.5.0` in your Ember app's `package.json`:
 
 ```json
 {
   "devDependencies": {
     "ember-cli-rails-addon": "~> 0.5.0"
@@ -176,10 +176,19 @@
     render layout: false
   end
 end
 ```
 
+**NOTE**
+
+When specifying a controller of your own, make sure [the controller is a
+descendant of `ApplicationController`][#321], and [`ApplicationController` is a
+descendant of `ActionController::Base`][#320].
+
+[#320]: https://github.com/thoughtbot/ember-cli-rails/issues/320
+[#321]: https://github.com/thoughtbot/ember-cli-rails/issues/321
+
 ### Rendering the EmberCLI generated JS and CSS
 
 In addition to rendering the EmberCLI generated `index.html`, you can inject the
 `<script>` and `<link>` tags into your Rails generated views:
 
@@ -187,10 +196,14 @@
 <!-- app/views/application/index.html.erb -->
 <%= include_ember_script_tags :frontend %>
 <%= include_ember_stylesheet_tags :frontend %>
 ```
 
+**NOTE**
+
+These helpers are only available for Rails versions `>= 4.0`.
+
 ### Multiple Ember CLI apps
 
 In the initializer you may specify multiple Ember CLI apps, each of which can be
 referenced with the view helper independently. You'd accomplish this like so:
 
@@ -240,23 +253,10 @@
     ...
   }
 }
 ```
 
-Finally, configure each app's `router.js` file so that `rootURL` refers to the
-new `baseURL`:
-
-```javascript
-/* app/frontend/app/router.js */
-var Router = Ember.Router.extend({
-  rootURL:  config.baseURL, // add this line
-  location: config.locationType
-});
-```
-
-Repeat the process for `admin_panel/app/router.js`.
-
 ## CSRF Tokens
 
 Your Rails controllers, by default, are expecting a valid authenticity token to be submitted with non-`GET` requests.
 Without it you'll receive a `422 Unprocessable Entity` error, specifically: `ActionController::InvalidAuthenticityToken`.
 
@@ -521,13 +521,17 @@
 ## Ruby and Rails support
 
 This project supports:
 
 * Ruby versions `>= 2.1.0`
-* Rails `3.2.x` and `>=4.1.x`.
+* Rails versions `3.2.x` and `>=4.1.x`.
 
+[Rendering EmberCLI-generated assets through Sprockets](asset-helpers) is
+**NOT** supported for Rails `3.2.x`.
+
 To learn more about supported versions and upgrades, read the [upgrading guide].
 
+[asset-helpers]: #rendering-the-embercli-generated-js-and-css
 [upgrading guide]: /UPGRADING.md
 
 ## Contributing
 
 See the [CONTRIBUTING] document.