bug fixes

Merge pull request #12 from britco/bug/fix-pagerduty-errors

added fix for our pager duty error, status_code was being set but is invalid

0.2.6a

Update setup.py

adjustments to service

0.2.6

Merge pull request #10 from britco/feature/amazon-checkout-ship-valid…

multi tier shipping

0.2.5

Update setup.py

multi tier shipping

Merge pull request #8 from britco/order-details

adding order details to amz

0.2.3: Merge pull request #7 from britco/bug/amz-select-payment

Do not validate the payment details for this service

0.2.2: Merge pull request #6 from britco/suppress-messages

removed error propagation into the message framework

fixes and tests

Merge pull request #5 from britco/make-tests-run

to have the test running

install fix

aligned the versions with the version in the file

added tax service

Merge pull request #2 from britco/update-cart-service

Update cart service