Merge pull request #403 from Shopify/ajax-cart-submit

Let ajax cart submit as normal form with proper quantity

snippets/ajax-cart-template.liquid

@@ -77,7 +77,7 @@
   {% raw %}
     <div class="ajaxcart__qty">
       <button type="button" class="ajaxcart__qty-adjust ajaxcart__qty--minus" data-id="{{id}}" data-qty="{{itemMinus}}">&minus;</button>
-      <input type="text" class="ajaxcart__qty-num" value="{{itemQty}}" min="0" data-id="{{id}}" aria-label="quantity" pattern="[0-9]*">
+      <input type="text" name="updates[]" class="ajaxcart__qty-num" value="{{itemQty}}" min="0" data-id="{{id}}" aria-label="quantity" pattern="[0-9]*">
       <button type="button" class="ajaxcart__qty-adjust ajaxcart__qty--plus" data-id="{{id}}" data-qty="{{itemAdd}}">+</button>
     </div>
   {% endraw %}