README.md in second_level_cache-1.5.1 vs README.md in second_level_cache-1.6.0

@@ -13,20 +13,20 @@
 ## Install
 
 In your gem file:
 
 ```ruby
-gem "second_level_cache", :git => "git://github.com/csdn-dev/second_level_cache.git"
+gem "second_level_cache", "~> 1.5"
 ```
 
 ## Usage
 
 For example, cache User objects:
 
 ```ruby
 class User < ActiveRecord::Base
-  acts_as_cached
+  acts_as_cached(:version => 1, :expires_in => 1.week)
 end
 ```
 
 Then it will fetch cached object in this situations:
 
@@ -35,18 +35,35 @@
 User.find_by_id(1)
 User.find_by_id!(1)
 User.find_by_id_and_name(1, "Hooopo")
 User.where(:status => 1).find_by_id(1)
 user.articles.find_by_id(1)
-user.articles.find(1), user.where(:status => 1).find(1)
+user.articles.find(1)
+User.where(:status => 1).find(1)
 article.user
 ```
 
 Cache key:
 
 ```ruby
 user = User.find 1
-user.second_level_cache_key  # We will get the key looks like "slc/user/1"
+user.second_level_cache_key  # We will get the key looks like "slc/user/1/0"
+```
+
+Disable SecondLevelCache:
+
+```ruby
+  User.without_second_level_cache do
+    user = User.find 1
+    # ...
+  end
+```
+
+Only `SELECT *` query will be cached:
+
+```ruby
+  # this query will NOT be cached
+  User.select("id, name").find(1)
 ```
 
 Notice:
 
 * SecondLevelCache cache by model name and id, so only find_one query will work.