An activity may have multiple reasons

The relationship between Activity and Reasons is now many-to-many.

Some improvement in show activity layout.

refs #4 #7

Entity/Activity.php

@@ -27,6 +27,7 @@ use Chill\ActivityBundle\Entity\ActivityType;
 use Chill\PersonBundle\Entity\Person;
 use Chill\MainBundle\Entity\HasCenterInterface;
 use Chill\MainBundle\Entity\HasScopeInterface;
+use Doctrine\Common\Collections\ArrayCollection;
 
 /**
  * Activity
@@ -64,9 +65,9 @@ class Activity implements HasCenterInterface, HasScopeInterface
     private $attendee;
 
     /**
-     * @var ActivityReason
+     * @var \Doctrine\Common\Collections\Collection
      */
-    private $reason;
+    private $reasons;
 
     /**
      * @var ActivityType
@@ -82,6 +83,11 @@ class Activity implements HasCenterInterface, HasScopeInterface
      * @var Person
      */
     private $person;
+    
+    public function __construct()
+    {
+        $this->reasons = new ArrayCollection();
+    }
 
 
     /**
@@ -215,27 +221,32 @@ class Activity implements HasCenterInterface, HasScopeInterface
     }
 
     /**
-     * Set reason
+     * Add a reason
      *
      * @param ActivityReason $reason
      *
      * @return Activity
      */
-    public function setReason(ActivityReason $reason)
+    public function addReason(ActivityReason $reason)
     {
-        $this->reason = $reason;
+        $this->reasons[] = $reason;
 
         return $this;
     }
+    
+    public function removeReason(ActivityReason $reason)
+    {
+        $this->reasons->removeElement($reason);
+    }
 
     /**
-     * Get reason
+     * Get reasons
      *
-     * @return ActivityReason
+     * @return \Doctrine\Common\Collections\Collection
      */
-    public function getReason()
+    public function getReasons()
     {
-        return $this->reason;
+        return $this->reasons;
     }
 
     /**