docs: reorder install instruction to promote usage of composer

README.md

@@ -29,10 +29,6 @@
 
 ## Installation
 
-### Standalone
-
-Just copy the files to your project, and include the `src/autoload.php` file. We recommend using Composer if at all possible.
-
 ### Using Composer
 
 Define the following requirement in your `composer.json` file:
@@ -47,6 +43,10 @@ Define the following requirement in your `composer.json` file:
 
 And include the global `vendor/autoload.php` autoloader.
 
+### Standalone
+
+Just copy the files to your project, and include the `src/autoload.php` file. We recommend using Composer if at all possible.
+
 ## Usage
 
 To begin creating imgix URLs programmatically, add the php files to your project (an example autoloader is also provided). The URL builder can be reused to create URLs for any