Updated README

Author: mario-deluna

README.md

@@ -1,3 +1,23 @@
 # PHP-GLFW IDE Stubs    
 
 This repo contains the PHP-GLFW / OpenGL extensions IDE stubs. This enabled autocompletion in your editor of choice that supports it. It also contains documentation data for quick lookups of what a function does.
+
+## Installation
+
+To use stubs simply require them as a dev dependency via composer.
+
+```
+composer require --dev phpgl/ide-stubs
+```
+
+## Documenation
+
+This repository contains only stubs (function signatures) of PHP-GLFW the OpenGL and GLFW extension for PHP.
+
+Checkout the main repository:
+
+> [PHP-GFLW](https://github.com/mario-deluna/php-glfw)
+
+And the full documentation of the extension here:
+
+> [Full Documenation / Website](https://phpgl.net)