Merge pull request #9 from reu/patch-1

Minor typo fix

Readme.mkd

@@ -34,7 +34,7 @@ This simple example assumes an integer column called `row_order`.  To order Duck
 
     Duck.rank(:row_order).all
 
-The ranking integers stored in the `raw_order` column will be big and spaced apart.  When you
+The ranking integers stored in the `row_order` column will be big and spaced apart.  When you
 implement a sorting UI, just update the resource with the position instead:
 
     @duck.update_attribute :row_order_position, 0  # or 1, 2, 37. :first and :last are also valid