Add serializer docs.

Author: yajra

documentation.md

@@ -23,6 +23,7 @@
 	- [Array Response](/docs/laravel-datatables/{{version}}/response-array)
 	- [Object Response](/docs/laravel-datatables/{{version}}/response-object)
 	- [Fractal Transformer](/docs/laravel-datatables/{{version}}/response-fractal)
+	- [Fractal Serializer](/docs/laravel-datatables/{{version}}/response-fractal-serializer)
 	- [Additional Data Response](/docs/laravel-datatables/{{version}}/response-with)
 - Column Editing
 	- [Add Column](/docs/laravel-datatables/{{version}}/add-column)

response-fractal-serializer.md

@@ -0,0 +1,16 @@
+# Fractal Transformer Serializer
+
+You can set the serializer to be used by Datatables using `setSerializer` api. Serializer should be used with `setTransformer` api.
+
+```php
+use Datatables;
+
+Route::get('user-data', function() {
+	$model = App\User::query();
+
+	return Datatables::eloquent($model)
+					->setTransformer(new App\Transformers\UserTransformer)
+					->setSerializer(new App\Serializers\CustomSerializer)
+					->make(true);
+});
+```