Merge pull request #1 from gmacdougall/2-3-dev

Extract current order params to a function.
Pend the tests failing the build when starting our fork

- We may be able to cherry some commits that fix this or fix the tests
ourselves, but in the meantime it'd be nice to have a green build to
make sure we don't break any other spree functionality
Merge pull request #2 from gmacdougall/2-3-dev

Extract last_incomplete_order to method.
Change product_url to product_path.

I'm not sure why product_url was introduced, but I'm currently
encountering issues in production where it's not respecting subdomains,
HTTPS, and ports correctly.

Nearly everything else in Spree links to stuff using the _path helpers,
which I like a lot better.