README.md in spree_sendwithus-2.0.11.4 vs README.md in spree_sendwithus-2.0.11.5

@@ -5,32 +5,32 @@
 
 Installation
 ------------
 
 Add spree_sendwithus to your Gemfile:
-
 ```ruby
+# Rubygems
+gem 'spree_sendwithus'
+
+# Direct from Github
 gem 'spree_sendwithus', github: 'freerunningtech/spree_sendwithus'
 ```
 
 Bundle your dependencies and run the installation generator:
-
 ```shell
 bundle install
 ```
 
 Add `send_with_us.rb` in `config/initializers` with the following:
-
 ```ruby
 SendWithUs::Api.configure do |config|
   config.api_key = ENV["SEND_WITH_US_API_KEY"]
   config.debug = true
 end
 ```
 
 Now you can configure any of your mailers to use SendWithUs by making them a subclass of `Spree::SendWithUsMailer::Base`. For example:
-
 ```ruby
 # app/mailers/spree/quality_control_mailer.rb
 
 class Spree::QualityControlMailer < Spree::SendWithUsMailer::Base
   default recipient_name: "Quality Control",
@@ -40,11 +40,14 @@
 
   def reprint(original, reprint)
     assign(:original, order_data(Spree::Order.find(original)))
     assign(:reprint, order_data(Spree::Order.find(reprint)))
 
-    mail(email_id: "SEND_WITH_US_TEMPLATE_ID")
+    mail(
+      email_id: 'SEND_WITH_US_TEMPLATE_ID',
+      esp_account: 'SEND_WITH_US_ESP_API_ID' # Optional
+    )
   end
 
   private
   def order_data(order)
     {
@@ -54,23 +57,28 @@
   end
 end
 ```
 
 The mailer will work with delayed job or without:
-
 ```ruby
 # Delayed
 Spree::QualityControlMailer.delay.reprint(1, 2)
 
 # Inline
 Spree::QualityControlMailer.reprint(1, 2).deliver
 ```
 
 Also, the default URL host will be pulled from `config.action_mailer.default_url_options` so there's no need for any extra configuration! You're welcome!
 
+RSpec
+-----
+Have spree_sendwithus mailers? Want to do some testing with RSpec? Don't want to hit the API?! Then look no further! Just add the following to your `spec_helper.rb` and bask in the glory that is mocking!
+```ruby
+require 'spree_sendwithus/rspec_support'
+```
+
 Testing
 -------
-
 Be sure to bundle your dependencies and then create a dummy test app for the specs to run against.
 
 ```shell
 bundle
 bundle exec rake test_app