Bugfixes: Reactor initial-active state, wire burnout

Reactors now properly stay active/inactive across chunk loads and
server reboots
Power taps now properly switch to a "disconnected" state when wires
burn out nearby
Update Roadmap.md
Reprocessor: 2:1 waste/fuel ratio

Avoiding "infinite fuel" loop by making cyanite reprocessors require 2
units of waste to produce 1 unit of blutonium.
Better multiblock reprocessors to be done later™
Waste ejection setting framework

Adds framework for waste ejection settings on reactors: auto-eject
(eject if any waste), auto-replace (eject if it can be replaced with
fuel), manual (eject only on user command).

Nonfunctional for now.