use only first 5 digits of zipcode, usps doesn't like 9 digits
minimum weight is set to 0.1oz instead of 1oz
fix postal codes andweights
there where cases when postal codes had either dashes or whitespace
weights are now always calculated from the shipment.line_items
and it sets a default weight equal to 0.1oz to the products that dont
have a weight set on them, this ideally should be fixed on each product
refactored weight settings
minimum total weight post to weightoz elements
there where cases where the total WeightOz value
was a value lower than 0.1 but bigger than 0
in which cases round(1) was rounding to 0
(e.g.:) 0.01.round(1) == 0.0
fixed weight defaults and set multiplier as pref