Bunch of changes including mpdf library for creating pdf of invoices. It now attaches a PDF invoice when marked sent. Don't mark invoice_status sent if it partial or paid, removed green text from balance under clients only use red if the client has a balance and some other cleanups were done

vendor/setasign/fpdi/src/autoload.php

@@ -0,0 +1,20 @@
+<?php
+/**
+ * This file is part of FPDI
+ *
+ * @package   setasign\Fpdi
+ * @copyright Copyright (c) 2019 Setasign - Jan Slabon (https://www.setasign.com)
+ * @license   http://opensource.org/licenses/mit-license The MIT License
+ */
+
+spl_autoload_register(function ($class) {
+    if (strpos($class, 'setasign\Fpdi\\') === 0) {
+        $filename = str_replace('\\', DIRECTORY_SEPARATOR, substr($class, 14)) . '.php';
+        $fullpath = __DIR__ . DIRECTORY_SEPARATOR . $filename;
+
+        if (file_exists($fullpath)) {
+            /** @noinspection PhpIncludeInspection */
+            require_once $fullpath;
+        }
+    }
+});