README and Service Provider changes

Author: upwebdesign

README.md

@@ -18,6 +18,8 @@ Then add to the aliases array the following:
 
 Publish config file via `php artisan config:publish upwebdesign/laravel-lob`.
 
+### Usage
+
 You will now have access to the lob-php classes and methods to make your API calls
 ```php
 Lob::addresses()->verify([

src/Upwebdesign/Lob/LobServiceProvider.php

@@ -30,7 +30,7 @@ public function register()
     {
         $that = $this;
         $this->app->singleton('lob', function() use ($that) {
-            return new Lob($this->app['config']->get('services.lob.api_key'));
+            return new Lob($this->app['config']->get('laravel-lob::api_key'));
         });
     }