update with changes from Production branch

db/migrate/20120215111613_add_index_to_users.rb

@@ -0,0 +1,9 @@
+class AddIndexToUsers < ActiveRecord::Migration
+  def self.up
+    add_index :users, :email
+  end
+
+  def self.down
+    remove_index :users, :email
+  end
+end