Created package installer JSON config file

Ryan Tablada has developed a package installer for Laravel 4 :
https://github.com/rtablada/package-installer

Video : http://www.youtube.com/watch?v=JTnIbIIQAcA

Adding a provides.json file to a package will make it super easy to install this package from Laravel 4 command line by calling :
php artisan package:install intervention/image