Fixed problem with Request Json array

Fixed content type for browsers that also send character encoding, and
now send the JSON data through the Collection system.

flight/net/Request.php

@@ -185,9 +185,11 @@ class Request {
             $this->query->setData($_GET);
         }
 
-        if ($this->type == 'application/json' && $this->body != '') {
+        if (strpos($this->type, 'application/json') === 0 && $this->body != '') {
             $this->json = json_decode($this->body, true);
+			$this->json = new Collection($this->json);
         }
+		
     }
 
     /**