Merge pull request laravel#937 from jkingsman/4.2

Added a noun and added a serial (AKA Oxford) comma

Author: taylorotwell

homestead.md

@@ -13,7 +13,7 @@ Laravel strives to make the entire PHP development experience delightful, includ
 
 Laravel Homestead is an official, pre-packaged Vagrant "box" that provides you a wonderful development environment without requiring you to install PHP, HHVM, a web server, and any other server software on your local machine. No more worrying about messing up your operating system! Vagrant boxes are completely disposable. If something goes wrong, you can destroy and re-create the box in minutes!
 
-Homestead runs on any Windows, Mac, and Linux, and includes the Nginx web server, PHP 5.6, MySQL, Postgres, Redis, Memcached and all of the other goodies you need to develop amazing Laravel applications.
+Homestead runs on any Windows, Mac, or Linux system, and includes the Nginx web server, PHP 5.6, MySQL, Postgres, Redis, Memcached, and all of the other goodies you need to develop amazing Laravel applications.
 
 > **Note:** If you are using Windows, you may need to enable hardware virtualization (VT-x). It can usually be enabled via your BIOS.