rename 'label' to 'name'.

Warning : this commit require to rename some table column, but the
original Version file has been update.

If you do not care to loose your date, you may run :

```
php app/console doctrine:migrations:execute --down 20160318111334
php app/console doctrine:migrations:execute --up 20160318111334
php app/console doctrine:cache:metadata #(if you have a cache for
doctrine meta date)
```
close #20

Resources/views/EventType/index.html.twig

@@ -16,7 +16,7 @@
         {% for entity in entities %}
             <tr>
                 <td><a href="{{ path('{_locale}_admin_show', { 'id': entity.id }) }}">{{ entity.id }}</a></td>
-                <td>{{ entity.label }}</td>
+                <td>{{ entity.name }}</td>
                 <td>{{ entity.active }}</td>
                 <td>
                 <ul>

Resources/views/EventType/show.html.twig

@@ -10,8 +10,8 @@
                 <td>{{ entity.id }}</td>
             </tr>
             <tr>
-                <th>Label</th>
-                <td>{{ entity.label }}</td>
+                <th>Name</th>
+                <td>{{ entity.name }}</td>
             </tr>
             <tr>
                 <th>Active</th>