README.md in govuk_elements_rails-0.2.1 vs README.md in govuk_elements_rails-0.2.2

@@ -13,10 +13,23 @@
 
 If you are installing from git, ensure you enable submodules like so:
 
     gem 'govuk_elements_rails', :git => "https://github.com/ministryofjustice/govuk_elements_rails.git", :submodules => true
 
+If you are working on the gem itself, clone and download submodules like this:
+
+    git clone https://github.com/ministryofjustice/govuk_elements_rails.git
+    cd govuk_elements_rails
+    git submodule init
+    git submodule update
+
+To add a javascript file to gem, create new symlink to govuk_elements file like this:
+
+    cd vendor/assets/javascripts/
+    ln -s ../../../govuk_elements/public/javascripts/application.js
+    ls -l
+
 ## Usage
 
 At the top of a Sass file in your Rails project you should use an `@import` rule
 to include the file for the mixins you require. For example here are all the
 imports possible:
@@ -40,16 +53,9 @@
 
     // from govuk_elements gem
     //= require details.polyfill
     //= require bind
     //= require selection-buttons
-
-## Usage of GovukElementsFormBuilder
-
-To replace the default form builder with a version that generates GOV.UK Elements classed markup, set the following in
-config/application.rb:
-
-    config.use_govuk_elements_form_builder = true
 
 ## Alternate ways to reuse GOV.UK Elements
 
 There are other alternate ways to include GOV.UK Elements files in a Rails
 project, for example via `Bower`. Feel free to use an alternate approach if it