Added Request_Cookie_Jar example

examples/cookie_jar.php

@@ -0,0 +1,20 @@
+<?php
+
+// First, include Requests
+include('../library/Requests.php');
+
+// Next, make sure Requests can load internal classes
+Requests::register_autoloader();
+
+// Say you need to fake a login cookie
+$c = new Requests_Cookie_Jar(['login_uid' =>  'something']);
+
+// Now let's make a request!
+$request = Requests::get(
+	'http://httpbin.org/cookies', //url
+	[],  // No need to set the headers the Jar does this for us
+	['cookies' => $c] // Pass in the Jar as an option
+);
+
+// Check what we received
+var_dump($request);