Merge pull request #169 from wenzuochao/dev_4.8

add new way of installing aliyun-cli into readme

Author: wenzuochao

README-CN.md

@@ -67,6 +67,14 @@
 	$ make install
 	```
 
+- **使用brew**
+
+   如果你的电脑上安装了 `brew`, 你可以使用它来安装阿里云命令行工具:
+   
+   ```
+   $ brew install aliyun-cli
+   ```
+
 ## 配置
 
 在使用阿里云CLI前，您需要运行`aliyun configure`命令进行配置。在配置阿里云CLI时，您需要提供阿里云账号以及一对AccessKeyId和AccessKeySecret。

README.md

@@ -66,7 +66,14 @@ You can install Alibaba Cloud CLI either through the installer or the source cod
 	$ cd aliyun-cli
 	$ make install
 	```
-
+- **Use brew**
+
+   If you have installed `brew` in your computer, you can use it to install Alibaba Cloud CLI as following:
+   
+   ```
+   $ brew install aliyun-cli
+   ```
+   
 ## Configure
 
 Before using the CLI, you must complete the basic configurations.