add documentation about fields visibility in person

source/bundles/person.rst

@@ -63,6 +63,15 @@ Example of configuration:
    chill_person:
       validation:
          birthdate_not_after: P15Y
+      person_fields:
+         # note: visible is the default config. This key may be omitted if visible is chosen.
+         nationality: hidden
+         email: hidden
+         place_of_birth: visible
+         phonenumber: hidden
+         country_of_birth: hidden
+         marital_status: visible
+         spoken_languages: hidden
 
 birthdate_not_after *string*
    The period duration before today during which encoding birthdate is not possible. The period is a string matching the format of `ISO_8601`, which is also use to build `DateInterval classes <http://php.net/manual/en/dateinterval.construct.php>`_.
@@ -70,3 +79,34 @@ birthdate_not_after *string*
    Example: `P1D`, `P18Y`
 
    Default value: `P1D` which means that birthdate before the current day (= yesterday) are allowed.
+
+person_fields *array*
+   This define the visibility of some fields. By default, all fields are visible, but you can choose to hide some of them. Available keys are : 
+   
+   * `nationality`
+   * `country_of_birth`
+   * `place_of_birth`
+   * `phonenumber`
+   * `email`
+   * `marital_status`
+   * `spoken_languages`
+
+   Possibles values: `hidden` or `visible` (all other value will raise an Exception).
+
+   Default value : `visible`, which means that all fields are visible.
+
+   Example: 
+
+   .. code-block:: yaml
+
+      chill_person:
+         person_fields:
+            nationality: hidden
+            email: hidden
+            phonenumber: hidden
+
+.. note:: 
+   If all the field of a "box" are hidden, the whole box does not appears. Example: if the fields `phonenumber` and `email` are hidden, the title `Contact information` will be hidden in the UI.
+
+.. note:: 
+   If you hide multiple fields, for a better integration you may want to override the template, for a better appeareance. See `the symfony documentation <http://symfony.com/doc/current/book/templating.html#overriding-bundle-templates>`_ about this feature.