allow to load person interactively

- return results as json in PersonSearch
- update PickPersonType to load peoples with ChoiceLoader

Controller/PersonController.php

@@ -32,6 +32,7 @@ use Symfony\Component\Security\Core\Role\Role;
 use Chill\PersonBundle\Security\Authorization\PersonVoter;
 use Chill\PersonBundle\Search\SimilarPersonMatcher;
 use Symfony\Component\Translation\TranslatorInterface;
+use Chill\MainBundle\Search\SearchProvider;
 
 class PersonController extends Controller
 {
@@ -46,7 +47,7 @@ class PersonController extends Controller
      * @var TranslatorInterface
      */
     protected $translator;
-
+    
     public function __construct(
         SimilarPersonMatcher $similarPersonMatcher,
         TranslatorInterface $translator