README.md in second_level_cache-2.2.6 vs README.md in second_level_cache-2.3.0.beta

@@ -38,11 +38,11 @@
 
 For example, cache User objects:
 
 ```ruby
 class User < ActiveRecord::Base
-  acts_as_cached(version: 1, expires_in: 1.week)
+  second_level_cache expires_in: 1.week
 end
 ```
 
 Then it will fetch cached object in this situations:
 
@@ -65,11 +65,13 @@
 
 ```ruby
 user = User.find(1)
 user.expire_second_level_cache
 ```
+
 or expires cache using class method:
+
 ```ruby
 User.expire_second_level_cache(1)
 ```
 
 Disable SecondLevelCache:
@@ -95,19 +97,19 @@
 * SecondLevelCache sync cache after transaction commit:
 
 ```ruby
 # 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"
+  user.save
+  account.save
+  Rails.logger.info "info"
 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
+  user.save
+  account.save
 end # <- Cache write
 Rails.logger.info "info"
 ```
 
 * If you are using SecondLevelCache with database_cleaner, you should set cleaning strategy to `:truncation`:
@@ -117,31 +119,34 @@
 ```
 
 ## Configure
 
 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 }]
+config.cache_store = [:dalli_store, APP_CONFIG["memcached_host"], { namespace: "ns", compress: true }]
 ```
 
 ## 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
 SecondLevelCache.configure.cache_key_prefix = "slc1"
 ```
-* When schema of your model changed, just change the `version` of the speical model, avoding clear all the cache.
 
+* SecondLevelCache was added model schema digest as cache version, this means when you add/remove/change columns, the caches of this Model will expires.
+* When your want change the model cache version by manualy, just add the `version` option like this:
+
 ```ruby
 class User < ActiveRecord::Base
-  acts_as_cached(version: 2, expires_in: 1.week)
+  second_level_cache 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")
@@ -154,9 +159,10 @@
 
 ```ruby
 Answer.includes(:question).limit(10).order("id DESC").each{|answer| answer.question.title}
 Answer Load (0.2ms)  SELECT `answers`.* FROM `answers` ORDER BY id DESC LIMIT 10 # Only one SQL query and one Rails.cache.read_multi fetching operation.
 ```
+
 [Details for read_multi feature](http://hooopo.writings.io/articles/a9cae5e0).
 
 ## Contributors
 
 * [chloerei](https://github.com/chloerei)