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

Entity/EventType.php

@@ -15,7 +15,7 @@ class EventType
     /**
      * @var array
      */
-    private $label;
+    private $name;
 
     /**
      * @var boolean
@@ -58,9 +58,9 @@ class EventType
      *
      * @return EventType
      */
-    public function setLabel($label)
+    public function setName($label)
     {
-        $this->label = $label;
+        $this->name = $label;
 
         return $this;
     }
@@ -70,9 +70,9 @@ class EventType
      *
      * @return array
      */
-    public function getLabel()
+    public function getName()
     {
-        return $this->label;
+        return $this->name;
     }
 
     /**