restore shortcut to application properties

Author: grs

lib/message.js

@@ -328,13 +328,11 @@ message.decode = function(buffer) {
             console.warn('WARNING: expected described message section got ' + JSON.stringify(s));
         }
     }
-    /*
     if (msg.application_properties) {
         for (var key in msg.application_properties) {
             add_property_shortcut(msg, 'application_properties', key);
         }
     }
-    */
     return msg;
 };