Add usage and description to README.md

Author: erikgall

README.md

@@ -1,3 +1,25 @@
 # PHP-CS-Fixer Config
 
-> TODO
+This package contains the `PHP-CS-Fixer` configuration that I use on all projects. It is best used with a Laravel application (but can be used very easily w/ any PHP project -- copy the `.php_cs` in the root directory to your project after installing via Composer).
+
+I have spent a lot of time building of this configuration file over the years. Feel free to open up a PR if you think a new rule should be added to the configuration.
+
+## Install the package
+
+```bash
+composer require erikgall/php-cs-fixer-config
+```
+
+## Commands / Usage
+
+### Running Install Command (Laravel)
+
+```bash
+php artisan fixer:install
+```
+
+### Running Fix Command (Laravel)
+
+```bash
+php artisan fix
+```