restored autoloader file

Author: oscarotero

README.md

@@ -33,7 +33,7 @@ This package is installable and autoloadable via Composer as [embed/embed](https
 $ composer require embed/embed
 ```
 
-If you cannot (or don't want to) use composer, a [PSR-4](https://packagist.org/search/?tags=PSR-4) loader is needed.
+If you cannot (or don't want to) use composer, just include the [PSR-4 autoload.php file](src/autoloader.php) in your code.
 
 ## Usage
 

src/autoloader.php

@@ -0,0 +1,13 @@
+<?php
+
+spl_autoload_register(function ($class) {
+    if (strpos($class, 'Embed\\') !== 0) {
+        return;
+    }
+
+    $file = __DIR__.str_replace('\\', DIRECTORY_SEPARATOR, substr($class, strlen('Embed'))).'.php';
+
+    if (is_file($file)) {
+        require_once $file;
+    }
+});