Added toJSON method to DAO object so it behaves with backbone.js

lib/dao.js

@@ -224,6 +224,11 @@ module.exports = (function() {
     this.validators[attribute] = validators
     this.validators[attribute] = validators
   }
   }
   
   
+  // RAG
+  DAO.prototype.toJSON = function() {
+    return this.values;
+  }
+
   // private
   // private
 
 
   var initAttributes = function(values) {
   var initAttributes = function(values) {