Update README.md

Author: marktopper

README.md

@@ -1,2 +1,12 @@
 # dd
 `dd` is a helper method in Laravel. This package will add the `dd` to your application.
+
+# Install
+Run `composer require marktopper/dd 1.*`
+
+# For Laravel
+[Laravel](http://laravel.com) already have the `dd` function in its helpers.
+The `dd` function from this package is equal to the one in Laravel 5.
+
+If you wish to override the Laravel 4 function with this one, you have to move the `"marktopper/dd": "1.*"` above the `"laravel/framework": "___"` in the `require` section of your `composer.json`.
+And then run `composer dump-autoload`