Copied cart header to sidebar, when cart is empty.
Outputting total_price in line items partial.
Fixed some things. Broke some others. Bottomline: PHP sucks.
Changed so much. I'm horrible and I don't care. You can add stuff via AJAX.
Showing currency at the end of the price.
Defined  in index page. Removed boilerplate in cart sidebar partial.
cart_is_empty works properly.
Styled cart some more. Changed to english names in table headers.
Updated cart h1 h3 styles. Made buttons more contemporary.
Carts can be emptied. Cleaned up some ugliness in the AJAX code.
Slimmed some more gnarly code. Also introduced cart_response_helper.
Made buttons look better in sidebar and on products.
Made rows highlight on hover.
Simplified button hovering effect.