[ic] adding weight to shipping calculation

[David Etheredge]

> How can I add 1 lb to my total shipping weight?

> I have exact weights for my products, but the total does not include the
> weight of packaging material.

>From checkout.html

      [if items]
        [then]

    <!-- Add the weight of shipping box at start -->
    >>>        [seti weight] [summary amount="0.8"] [/seti]   <!-- Start at
0.8 lb -->

        [item-list modular=1]