Added PDF for pregenerated PDF

vendor/setasign/fpdf/README.md

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+# FPDF
+**This repository is only made for cloning official FPDF releases which are available at: http://www.fpdf.org**
+**THERE WILL BE NO DEVELOPMENT IN THIS REPOSITORY!**
+
+FPDF is a PHP class which allows to generate PDF files with pure PHP. F from FPDF stands for Free: you may use it for any kind of usage and modify it to suit your needs.
+
+## Installation with [Composer](https://packagist.org/packages/setasign/fpdf)
+
+If you're using Composer to manage dependencies, you can use
+
+    $ composer require setasign/fpdf:^1.8
+
+or you can include the following in your composer.json file:
+
+```json
+{
+    "require": {
+        "setasign/fpdf": "^1.8"
+    }
+}
+```