add installation instructions

Author: freekmurze

README.md

@@ -31,13 +31,31 @@ You can install the package via composer:
 $ composer require spatie/laravel-permission
 ```
 
-## Usage
+This service provider must be installed.
+```php
+// config/app.php
+'providers' => [
+    ...
+    Spatie\Permission\PermissionServiceProvider::class,
+];
+```
+
+You can publish the migration with:
+```bash
+php artisan vendor:publish --provider="Spatie\Permission\PermissionServiceProvider" --tag="migrations"
+```
 
-``` php
-$skeleton = new Spatie\Skeleton();
-echo $skeleton->echoPhrase('Hello, Spatie!');
+After the migration has been published you can create the role- and permission-tables by
+running the migrations:
+
+```bash
+php artisan migrate
 ```
 
+## Usage
+
+
+
 ## Change log
 
 Please see [CHANGELOG](CHANGELOG.md) for more information what has changed recently.
@@ -54,7 +72,7 @@ Please see [CONTRIBUTING](CONTRIBUTING.md) for details.
 
 ## Security
 
-If you discover any security related issues, please email [email protected] instead of using the issue tracker.
+If you discover any security related issues, please email [[email protected]](mailto:[email protected]) instead of using the issue tracker.
 
 ## Credits