Implemented a hook that will allow users of this extension to implement an after_product_built in their product_import_decorator.rb that will get called after each product is built.
Sorry I've taken so long to get to this - I meant to look at how Spree does it's hooks, and then I forgot :-(
This looks good - it's a pity there's not a nicer way of adding the hook, but class_eval'ing will do for this sort of scenario.
Thanks for your contribution!
Merge pull request #6 from jzw/master
No problem, happy to help!