README.md in halva-0.1.0 vs README.md in halva-0.2.0

@@ -27,10 +27,12 @@
 ## Usage
 
 ### Representing an object
 
 ```ruby
+require 'halva'
+
 order = Order.find(1)
 Halva::Resource.from_model(order)
                .embed(Halva::Resource.from_model(order.customer).build, :customer)
                .link(Halva::Link.new('/orders/1', :self))
                .link(Halva::Link.new('/orders/1/customer', :customer))
@@ -39,9 +41,11 @@
 ```
 
 ### Representing a collection
 
 ```ruby
+require 'halva'
+
 orders = Order.find
 Halva::Resource.from_empty_model
                .embed(orders.map { |order| Halva::Resource.from_model(order).build })
                .link(Halva::Link.new('/orders?page=3', :next))
                .link(Halva::Link.new('/orders?page=2', :self))