Adopted composer autoload way

Split up classes into separate way, to allow autoloader to do it's work

Signed-off-by: Diederik de Groot <ddegroot@talon.nl>

lib/Crypto/Crypto.php

@@ -0,0 +1,12 @@
+<?php
+declare(strict_types=1);
+
+namespace PROVISION\Crypto;
+
+class Crypto {
+
+    public static function certificateHashAsBase64(string $certificateFile, int $hashAlg)  : string  {
+        return new Certificate($certificateFile)
+                .hashAsBase64($hashAlg);
+    }
+}