readme updated

Author: NikitaYeryomin

README.md

@@ -22,11 +22,16 @@ PHP library for interacting with the Qencode API.
       }
     }
 ``` 
-   Run composer:
+Run composer:
 ```bash
     php composer.phar install
 ```
 
+Include vendor/autoload.php:
+```php
+   require 'vendor/autoload.php';
+```
+
 If you don't use composer, use autoload.php located in the root of the repo:
 ```php
    require_once __DIR__ . '/../autoload.php';