Inital ITeleport API.

Implement this if you want LP to route items via your blocks.

Produced with consultation with ThermalExpansion; tesseracts will
probably end up implementing this. This interface would make ISC's able
to operate without manual config.

sendTo takes IPipedItems, because they contain extra routing
information.

Implementing ITeleport and ignoring ICareAboutTeleport will allow active
routing through your block, if directly connected to LogisticsPipes.
If you additionally Implement IPipeEntry, then
logistics-otherPipe-ITeleport ~~~ ITeleport-otherPipe-Logistics will
also work for active routing.