This update is for the coming Rust update
Removed reserved slot functionality as its no longer needed
Updated time and fuel calculation methods for new furnace system
Include item current smelt fraction in time and cost calculations
Update remaining time and fuel cost UI every second while furnace is on and player has its inventory open
Only show hours in time UI if there are hours remaining
Added oven smelt/cook rate to UI
Plugin now only works on ovens that either smelt or cook. Don't need it for lanterns and things like that