Upgrade to AWS for fetching covers from Amazon

[Mark Kretschmann]

Maxx_k asked me to post the relevant information from Amazon, so here we go:

Amazon ECS 3.0 - Important Migration Reminder

This is an important reminder that the Amazon E-Commerce Web Service
3.0 will be deprecated on March 31st, 2008, after which we will no
longer accept Amazon ECS 3.0 requests. If you are still using Amazon
ECS 3.0, please upgrade to the Amazon Associates Web Service
(previously called Amazon E-Commerce Web Service 4.0) by then to
ensure that you or your customers are not affected by the deprecation.
This deprecation was first announced a year ago in February 2007, and
we are continuing to notify current customers via e-mail. Amazon ECS
3.0 has had complete feature and data parity with Amazon ECS 4.0 since
June 2006 (Version: 2006-06-28). We will re-invest the existing
maintenance effort saved by discontinuing Amazon ECS 3.0 into Amazon
ECS 4.0 to allow for the introduction of more features and
capabilities.

-- 
Mark