Cleanup in src/, adding namespaces, removing php closing tag and general code cleanup

src/FactorGraphs/Message.php

@@ -1,14 +1,13 @@
-<?php
-namespace Moserware\Skills\FactorGraphs;
+<?php namespace Moserware\Skills\FactorGraphs;
 
 class Message
 {
-    private $_name;    
+    private $_name;
     private $_value;
 
     public function __construct(&$value = null, $name = null)
     {
-        $this->_name = $name;        
+        $this->_name = $name;
         $this->_value = $value;
     }
 
@@ -19,14 +18,12 @@ class Message
     }
 
     public function setValue(&$value)
-    {        
+    {
         $this->_value = &$value;
     }
 
     public function __toString()
     {
-        return $this->_name; 
+        return (string)$this->_name;
     }
-}
-
-?>
+}