Minify now allows static file serving

With slightly altered URLs, Minify can cache files so they're served directly
from the filesystem instead of through PHP. A simple library helps create URLs
and clearing the cache.

See `static/README.md` for details.

lib/Minify/Config.php

@@ -11,6 +11,11 @@ class Config
      */
     public $enableBuilder = false;
 
+    /**
+     * @var bool
+     */
+    public $enableStatic = false;
+
     /**
      * @var bool
      */