title: belongsTo method returning null
body: <p>I have two model one named <code>Customer</code> second one is <code>Website</code></p>
  
  <p>Relationship between them is, <code>Customer</code> hasMany <code>Website</code> while <code>Website</code> belongsTo <code>Customer</code></p>
  
  <p>This is how I am doing this</p>
  
  <pre><code>class Website extends \Eloquent {
      use SubscriptionBillableTrait;
  
      protected $fillable = [];
  
      protected $guarded = ['id'];
  
      public function customermodel()
      {
          // Return an Eloquent relationship.
          return $this-&gt;belongsTo('Customer')
      }
  
  }
  </code></pre>
  
  <p><code>Customer</code> model</p>
  
  <pre><code>use Mmanos\Billing\CustomerBillableTrait;
  class Customer extends \Eloquent {
      use CustomerBillableTrait;
      protected $fillable = [];
  
      protected $guarded = ['id'];
  
      public function websites() {
          return $this-&gt;hasMany('Website');
      }
  
  }
  </code></pre>
  
  <p>When I try to access <code>Customer</code> by relationship like this</p>
  
  <pre><code>$website = Website::find(1);
  return dd($website-&gt;customermodel);
  </code></pre>
  
  <p>It returns null</p>
  
  <p>Note:I am using Laravel 4</p>