README.md in horizon_client-0.2.0 vs README.md in horizon_client-0.2.1

@@ -1,12 +1,33 @@
 # HorizonClient
 
 Client to use with Horizon REST xml API.
 
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'horizon_client'
+```
+
+And then execute:
+
+```bash
+$ bundle
+```
+
+Or install it yourself as:
+
+```bash
+$ gem install horizon_client
+```
+
 ## Usage
 
 ```ruby
 client = HorizonClient.new
+client.logger = Logger.new(STDOUT)
 
 # incoming xml:
 # <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 # <resource>
 #   <entity>