prep for 2023. Fixed many bugs. Added pdf guide

vendor/phpoffice/phpspreadsheet/samples/Basic/20_Read_Ods.php

@@ -0,0 +1,13 @@
+<?php
+
+use PhpOffice\PhpSpreadsheet\IOFactory;
+
+require __DIR__ . '/../Header.php';
+
+$filename = __DIR__ . '/../templates/OOCalcTest.ods';
+$callStartTime = microtime(true);
+$spreadsheet = IOFactory::load($filename);
+$helper->logRead('Ods', $filename, $callStartTime);
+
+// Save
+$helper->write($spreadsheet, __FILE__);