fix(build-error): Add references file

Author: hypery2k

references.d.ts

@@ -0,0 +1,6 @@
+/// <reference path="./node_modules/tns-core-modules/tns-core-modules.es6.d.ts" /> 
+
+declare type FormData = any;
+declare var FormData;
+declare type Blob = any;
+declare var Blob;