admin - enhancements

Update to debugger to support being more easily added as a button in the
UI.
Added debugger to tax, shipping and promotions.
search - added a debug tool

Set ?debug=search on URI of storefront and query will be output as a
string in the console.
quickstart - updates to newsletter

Newsletter subscription call was deprecated.
Added support for buyerDetail for subscriptionLists.
More work on this needed.
admin - version