README.md in calculated_attributes-0.1.3 vs README.md in calculated_attributes-0.1.4

@@ -1,6 +1,7 @@
-[![Gem Version](https://badge.fury.io/rb/calculated_attributes.svg)](https://badge.fury.io/rb/calculated_attributes)
+[![Gem Version](https://badge.fury.io/rb/calculated_attributes.svg)](https://badge.fury.io/rb/calculated_attributes) 
+[![CircleCI](https://circleci.com/gh/aha-app/calculated_attributes.svg?style=shield)](https://circleci.com/gh/aha-app/calculated_attributes)
 
 # CalculatedAttributes
 
 Automatically add calculated attributes from accessory select queries to ActiveRecord models.
 
@@ -20,26 +21,28 @@
 
     $ gem install calculated_attributes
 
 ## Usage
 
-Add each calculated attribute to your model using the `calculated` keyword. It accepts two parameters: a symbol representing the name of the calculated attribute, and a lambda containing a string to calculate the attribute.
+Add each calculated attribute to your model using the `calculated` keyword. It accepts two parameters: a symbol representing the name of the calculated attribute, and a lambda containing a string to calculate the attribute. The lambda can accept arguments.
 
 For example, if we have two models, `Post` and `Comment`, and `Comment` has a `post_id` attribute, we might write the following code to add a comments count to each `Post` record in a relation:
 
 ```ruby
 class Post < ActiveRecord::Base
 ...
   calculated :comments_count, -> { "select count(*) from comments where comments.post_id = posts.id" }
+  calculated :comments_count_by_user, ->(user) { ["select count(*) from comments where comments.post_id = posts.id and posts.user_id = '%s'", user.id] }
 ...
 end
 ```
     
 Then, the comments count may be accessed as follows:
 
 ```ruby
 Post.scoped.calculated(:comments_count).first.comments_count
+Post.scoped.calculated(comments_count_by_user: user).first.comments_count_by_user
 #=> 5
 ```
     
 Multiple calculated attributes may be attached to each model. If we add a `Tag` model that also has a `post_id`, we can update the Post model as following:
 
@@ -67,17 +70,22 @@
 You may also use the `calculated` method on a single model instance, like so:
 
 ```ruby
 Post.first.calculated(:comments_count).comments_count
 #=> 5
+
+Post.first.calculated(comments_count_by_user: user).comments_count_by_user
+#=> 0
 ```
 
 If you have defined a `calculated` method, results of that method will be returned rather than throwing a method missing error even if you don't explicitly use the `calculated()` call on the instance:
 
 ```ruby
 Post.first.comments_count
 #=> 5
+Post.first.comments_count_by_user(user)
+#=> 0
 ```
 
 If you like, you may define `calculated` lambdas using Arel syntax:
 
 ```ruby
@@ -106,6 +114,6 @@
 4. Push to the branch (`git push origin my-new-feature`)
 5. Create a new Pull Request
 
 ## Credits
 
-Written by Zach Schneider based on ideas from Chris Waters.
\ No newline at end of file
+Written by Zach Schneider based on ideas from Chris Waters.