Final tweaks to the attributes spec to ensure functionality with Ruby 1.8.6, 1.8.7, 1.9.1 and 1.9.2.
Final tweaks to the attributes spec to ensure functionality with Ruby 1.8.6, 1.8.7, 1.9.1 and 1.9.2.

timmatheson/shippinglogic,binarylogic/shippinglogic