Simple example in Readme

README.md

@@ -2,3 +2,23 @@
 Simple library to track App Store reviews with Slack.
 
 >[Slack](https://slack.com/) is a platform for team communication
+
+### Installing via Composer
+```bash
+composer.phar require tjournal/reviewer:~0.1
+```
+
+After installing, you need to require Composer's autoloader:
+
+```php
+require 'vendor/autoload.php';
+```
+
+### Simple usage
+To track reviews just [create new Incoming webhook](https://slack.com/services/new/incoming-webhook) in Slack and add this code to crontab (once per hour):
+
+```php
+$reviewer = new TJ\Reviewer(683103523);
+$reviewer->setSlackSettings(['endpoint' => 'https://hooks.slack.com/services/ABCDE/QWERTY', 'channel' => '#reviews'])
+$reviewer->work();
+```