Defining :original for add_active_shipping_settings_tab

responding to warning message:

    No :original defined for 'add_active_shipping_settings_tab', you should change its definition to include:
     :original => '191af30ee9446f6ed95654122a6180b37929eb9c'

Fixes #130
Don't re-draw admin/product routes
Bump to active_shipping 0.11.0
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.
Updated the settings pages to the new UI standard introduced in Spree 1.3.
Added an icon to the product packages tab entry.
Gave the readme a long need updated.
Add the product package javascripts to the precompile list.

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

Fixes #162
Merge branch '1-3-stable' of github.com:spree/spree_active_shipping into 1-3-stable-bbc