Add the product package javascripts to the precompile list.

Signed-off-by: Nathan Lowrie <nate@finelineautomation.com>

Fixes #162
Fix the USPS service descriptions to be more consistent

Fixes #165
Remove origin address fields

These are now determined from the stock location's address instead
Fix zero weight check on services with regression test fixes #167
Remove origin address settings from admin bcakend
check if a package is shippable on available?
this change makes it easier for people to create their own calculators
and stops errors from happening when they previously forget to call
is_package_shippable? inside compute_package, there currently is a lot
of logic inside compute_package and the cleaner we keep it the better.

fixes #164
fixes #171
make sure we check for nil values first
else zero? will fail
bumps active_shipping to sort fedex API changes

Fixes #173
Fixes #175
Fix for already initialized constant errors

Fixes #176
Fixes #147
Fixes #75
Guard against missing shipping_method calculators

Fixes #176
Fixes #174
Fixes #75
product packages have priority over dimensions
this is required so we don't send and extra package
previously it would create a package with the default variant
attributes and append it to the product packages
update first class international resctrictions