sync with english docs

Author: wangsai

cn/quick.md

@@ -21,7 +21,7 @@ Laravel框架使用 [Composer](http://getcomposer.org) 执行安装和依赖管
 <a name="permissions"></a>
 ### 写入权限
 
-安装完 Laravel ，你还需要为web服务器设置 `app/storage` 目录的写入权限。请参考 [安装](/docs/artisan) 一节以获取更多关于配置方面的信息。
+安装完 Laravel ，你还需要为web服务器设置 `app/storage` 目录的写入权限。请参考 [安装](/docs/installation) 一节以获取更多关于配置方面的信息。
 
 <a name="directories"></a>
 ### 目录结构

cn/requests.md

@@ -159,6 +159,13 @@ If you would like to set a cookie before a response has been created, use the `C
 **获取 $_SERVER 数组里指定的值**
 
 	$value = Request::server('PATH_INFO');
+	
+**判断请求是否是通过 HTTPS 连接发送过来的**
+
+	if (Request::secure())
+	{
+		//
+	}
 
 **判断是否是使用ajax请求**
 
@@ -167,9 +174,9 @@ If you would like to set a cookie before a response has been created, use the `C
 		//
 	}
 
-**判断请求是否使用https连接**
+**检测是否是任何可能的 JSON 类型的请求**
 
-	if (Request::secure())
+	if (Request::ajax() or Request::isJson() or Request::wantsJson())
 	{
 		//
-	}
+	}

quick.md

@@ -23,7 +23,7 @@ If you prefer, you can alternatively download a copy of the [Laravel repository
 <a name="permissions"></a>
 ### Permissions
 
-After installing Laravel, you may need to grant the web server write permissions to the `app/storage` directories. See the [Installation](/docs/artisan) documentation for more details on configuration.
+After installing Laravel, you may need to grant the web server write permissions to the `app/storage` directories. See the [Installation](/docs/installation) documentation for more details on configuration.
 
 <a name="directories"></a>
 ### Directory Structure

requests.md

@@ -167,6 +167,13 @@ The `Request` class provides many methods for examining the HTTP request for you
 **Retrieving Values From $_SERVER**
 
 	$value = Request::server('PATH_INFO');
+	
+**Determining If The Request Is Over HTTPS**
+
+	if (Request::secure())
+	{
+		//
+	}
 
 **Determine If The Request Is Using AJAX**
 
@@ -175,9 +182,9 @@ The `Request` class provides many methods for examining the HTTP request for you
 		//
 	}
 
-**Determining If The Request Is Over HTTPS**
+**Detect any type of JSON request**
 
-	if (Request::secure())
+	if (Request::ajax() or Request::isJson() or Request::wantsJson())
 	{
 		//
 	}