README.md in shoden-0.2.0 vs README.md in shoden-0.3.0

@@ -1,6 +1,6 @@
-# Shôden
+# Shôden - [![Gem Version](https://badge.fury.io/rb/shoden.svg)](http://badge.fury.io/rb/shoden)
 
 ![Elephant god](http://www.redprintdna.com/wp-content/uploads/2011/09/L-Elephant-Against-Sky.jpg)
 
 Shôden is a persistance library on top of Postgres.
 It is basically an [Ohm](https://github.com/soveran/ohm) clone but using
@@ -42,7 +42,19 @@
 class Post < Shoden::Model
   attribute :title
   attribute :content
 
   reference :owner, :User
+end
+```
+
+## Indexing
+
+```ruby
+class User < Shoden::Model
+  attribute :email
+  attribute :country
+
+  index  :country
+  unique :email
 end
 ```