#105 [Feature] Fancy_vend ought to support lwcomponents' hopper

I intend to send through a pull request for this one, once I've done the development work.

It's a bit more complicated than I expected, because lwcomponents' hoppers don't have an inventory. (I'd forgotten this technicality.) Fancy_vend operates on the basis of pushing to an inventory, preferring a foreign one if possible, whereas lwcomponents operates by pulling stuff out of a specific inventory slot.

In the meantime, the workaround is to set up a vendor as follows, once PR #106 is accepted.

Vendor

hopper:hopper

lwcomponents:hopper

[onward connections]