add model + form to handle alt names

Resources/config/services/alt_names.yml

@@ -0,0 +1,4 @@
+services:
+    Chill\PersonBundle\Config\ConfigPersonAltNamesHelper:
+        arguments:
+            $config: '%chill_person.person_fields.alt_names%'

Resources/config/services/form.yml

@@ -3,6 +3,7 @@ services:
         class: Chill\PersonBundle\Form\PersonType
         arguments:
             - "%chill_person.person_fields%"
+            - '@Chill\PersonBundle\Config\ConfigPersonAltNamesHelper'
         tags:
             - { name: form.type }
     
@@ -29,3 +30,10 @@ services:
             - '@Symfony\Component\Translation\TranslatorInterface'
         tags:
             - { name: form.type }
+            
+    Chill\PersonBundle\Form\Type\PersonAltNameType:
+        arguments:
+            $configHelper: '@Chill\PersonBundle\Config\ConfigPersonAltNamesHelper'
+            $translatableStringHelper: '@chill.main.helper.translatable_string'
+        tags:
+            - { name: form.type }