Update docs

Author: Karin van den Berg

doc/organization.md

@@ -7,4 +7,22 @@ Additional APIs:
 * [Members API](organization/members.md)
 * [Teams API](organization/teams.md)
 
+
+Wraps [GitHub Issues API](https://developer.github.com/v3/issues/).
+
+### List issues in an organization
+
+```php
+$issues = $client->api('orgs')->issues('KnpLabs', 'php-github-api', array('state' => 'open'));
+```
+You can specify the page number:
+
+```php
+$issues = $client->api('orgs')->issues('KnpLabs', 'php-github-api', array('state' => 'open'), 2);
+```
+
+Returns an array of issues.
+
+
+
 To be written...