Add Promise polyfill for IE

codesignd/3-sugar/contact/contact.js

@@ -1,6 +1,3 @@
-//=require element-closest/element-closest.js
-//=require whatwg-fetch/fetch.js
-
 (function(app) {
 	'use strict';
 	

shared/3-sugar/ajax/ajax.js

@@ -1,5 +1,3 @@
-//=require element-closest/element-closest.js
-//=require whatwg-fetch/fetch.js
 //=require flexismooth/flexismooth.js
 
 (function(app) {

shared/polyfills.js

@@ -0,0 +1,3 @@
+//=require element-closest/element-closest.js
+//=require promise-polyfill/dist/polyfill.js
+//=require whatwg-fetch/dist/fetch.umd.js