add Install & Example in readme

README.md

@@ -5,3 +5,25 @@
 [![Coverage Status](https://coveralls.io/repos/crowdsdom/php-sdk/badge.svg?branch=master&service=github)](https://coveralls.io/github/crowdsdom/php-sdk?branch=master)
 [![Total Downloads](https://img.shields.io/packagist/dt/crowdsdom/php-sdk.svg?style=flat)](https://packagist.org/packages/crowdsdom/php-sdk)
 
+## Install
+```shell
+composer require crowdsdom/php-sdk
+```
+
+## Example
+
+```php
+$apiKey = '';
+$apiSecret = '';
+$crowdsdom = new Crowdsdom($apiKey, $apiSecret);
+$labor = $crowdsdom->labor();
+
+// get all jobs
+$jobs = $labor->job()->find();
+
+// get tasks of jobId
+$tasks = $labor->job()->tasks($jobId);
+
+// approve a task
+$labor->task()->approve($taskId);
+```