Switch from `EIDL` to `ecoinvent_interface`

[cmutel]

EIDL: https://github.com/haasad/EcoInventDownLoader
ecoinvent_interface: https://github.com/brightway-lca/ecoinvent_interface

[cmutel]

This should build on brightway-lca/brightway2-io#227.

@dgdekoning Can you look at this? It could be an easy win.