Redid the product packages admin interface. Brought it up to the new admin standard from 1.3.

The new and edit commands function like the images new command.

Wasn't a clean merge because of the Spree 2.0 translations

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

Conflicts:
	app/controllers/spree/admin/product_packages_controller.rb
	app/models/spree/product_decorator.rb
	app/views/spree/admin/product_packages/index.html.erb
	config/locales/en.yml
Updated the settings pages to the new UI standard introduced in Spree 1.3.

Merge wasn't clean again due to spree translations.

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

Conflicts:
	app/overrides/add_active_shipping_settings_tab.rb
	app/views/spree/admin/active_shipping_settings/edit.html.erb
	app/views/spree/admin/active_shipping_settings/show.html.erb
	config/locales/en.yml
Added an icon to the product packages tab entry.

I think the truck fits better than a barcode.

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

Conflicts:
	app/overrides/add_packages_tab.rb
Gave the readme a long need updated.

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

Conflicts:
	README.md