README.md in second_level_cache-2.1.8 vs README.md in second_level_cache-2.1.9

@@ -1,11 +1,11 @@
 # SecondLevelCache
 
-[![Gem Version](https://badge.fury.io/rb/second_level_cache.png)](http://badge.fury.io/rb/second_level_cache)
-[![Dependency Status](https://gemnasium.com/hooopo/second_level_cache.png)](https://gemnasium.com/hooopo/second_level_cache)
-[![Build Status](https://travis-ci.org/hooopo/second_level_cache.png?branch=master)](https://travis-ci.org/hooopo/second_level_cache)
-[![Code Climate](https://codeclimate.com/github/hooopo/second_level_cache.png)](https://codeclimate.com/github/hooopo/second_level_cache)
+[![Gem Version](https://badge.fury.io/rb/second_level_cache.svg)](http://badge.fury.io/rb/second_level_cache)
+[![Dependency Status](https://gemnasium.com/hooopo/second_level_cache.svg)](https://gemnasium.com/hooopo/second_level_cache)
+[![Build Status](https://travis-ci.org/hooopo/second_level_cache.svg?branch=master)](https://travis-ci.org/hooopo/second_level_cache)
+[![Code Climate](https://codeclimate.com/github/hooopo/second_level_cache.svg)](https://codeclimate.com/github/hooopo/second_level_cache)
 
 SecondLevelCache is a write-through and read-through caching library inspired by Cache Money and cache_fu, support ActiveRecord 4.
 
 Read-Through: Queries by ID, like `current_user.articles.find(params[:id])`, will first look in cache store and then look in the database for the results of that query. If there is a cache miss, it will populate the cache.
 
@@ -15,11 +15,11 @@
 ## Install
 
 In your gem file:
 
 ```ruby
-gem "second_level_cache", "~> 2.1.8"
+gem "second_level_cache", "~> 2.1.9"
 ```
 
 For ActiveRecord 3:
 
 ```ruby
@@ -89,17 +89,17 @@
 # user and account's write_second_level_cache operation will invoke after the logger.
 ActiveRecord::Base.transaction do
    user.save
    account.save
    Rails.logger.info "info"
-end # <- Cache write 
+end # <- Cache write
 
 # if you want to do something after user and account's write_second_level_cache operation, do this way:
 ActiveRecord::Base.transaction do
    user.save
    account.save
-end # <- Cache write 
+end # <- Cache write
 Rails.logger.info "info"
 ```
 
 * If you are using SecondLevelCache with database_cleaner, you should set cleaning strategy to `:truncation`:
 
@@ -112,11 +112,11 @@
 In production env, we recommend to use [Dalli](https://github.com/mperham/dalli) as Rails cache store.
 ```ruby
  config.cache_store = [:dalli_store, APP_CONFIG["memcached_host"], {:namespace => "ns", :compress => true}]
 ```
 
-## Tips: 
+## Tips:
 
 * When you want to clear only second level cache apart from other cache for example fragment cache in cache store,
 you can only change the `cache_key_prefix`:
 
 ```ruby
@@ -128,10 +128,10 @@
 class User < ActiveRecord::Base
   acts_as_cached(:version => 2, :expires_in => 1.week)
 end
 ```
 
-* It provides a great feature, not hits db when fetching record via unique key(not primary key). 
+* It provides a great feature, not hits db when fetching record via unique key(not primary key).
 
 ```ruby
 # this will fetch from cache
 user = User.fetch_by_uniq_keys(nick_name: "hooopo")
 post = Post.fetch_by_uniq_keys(user_id: 2, slug: "foo")