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

@@ -1,23 +1,39 @@
 # Hightop
 
 A nice shortcut for group count queries
 
-[![Build Status](https://travis-ci.org/ankane/hightop.svg)](https://travis-ci.org/ankane/hightop)
-
 ```ruby
 Visit.top(:browser)
 ```
 
 instead of
 
 ```ruby
 Visit.group(:browser).where("browser IS NOT NULL").order("count_all DESC, browser").count
 ```
 
-Be sure to [sanitize user input](http://rails-sqli.org/) like you must with `group`.
+Be sure to [sanitize user input](https://rails-sqli.org/) like you must with `group`
 
+Also works with arrays and hashes
+
+```ruby
+["up", "up", "down"].top(1)
+```
+
+[![Build Status](https://travis-ci.org/ankane/hightop.svg)](https://travis-ci.org/ankane/hightop)
+
+## Installation
+
+Add this line to your application’s Gemfile:
+
+```ruby
+gem 'hightop'
+```
+
+## Options
+
 Limit the results
 
 ```ruby
 Visit.top(:referring_domain, 10)
 ```
@@ -35,11 +51,11 @@
 ```
 
 And expressions
 
 ```ruby
-Visit.top("LOWER(referring_domain)")
+Visit.top(Arel.sql("LOWER(referring_domain)"))
 ```
 
 And distinct
 
 ```ruby
@@ -50,21 +66,39 @@
 
 ```ruby
 Visit.top(:city, min: 10)
 ```
 
-## Installation
+## Arrays and Hashes
 
-Add this line to your application’s Gemfile:
+Arrays
 
 ```ruby
-gem 'hightop'
+["up", "up", "down"].top
 ```
 
-And then execute:
+Hashes
 
-```sh
-bundle
+```ruby
+{a: "up", b: "up", c: "down"}.top { |k, v| v }
+```
+
+Limit the results
+
+```ruby
+["up", "up", "down"].top(1)
+```
+
+Include nil values
+
+```ruby
+[nil, nil, "down"].top(nil: true)
+```
+
+Min count
+
+```ruby
+["up", "up", "down"].top(min: 2)
 ```
 
 ## History
 
 View the [changelog](https://github.com/ankane/hightop/blob/master/CHANGELOG.md)