includes.js - update to how variations inputs are named

Changes to better support the new add to cart cmd.
admin orders - update for new pog input name format

was looking for pog_, which is no longer used.
some call shuffling

Getting some calls moved into the controller and up to the current spec
(w/ better error handling).
add to cart update

updated add to cart functionality to use the new cart append cmd
store product - bug fix

enlarge photo wasn't working on product detail page.
more work on add to cart.

some bugs in variations handling. updated the orders interface to use
the new add to cart handler.
more work on new checkout