Adds a 'spoil time' filter to stockpile and ingredient selectors.
Automatically turn meat/vegetables about to go bad into chemfuel before it spoils!
Set up stockpiles in such a way stuff is moved into the freezer only when it needs to be.
Note: The spoil time slider does *NOT* take into account the current temperature of the tile of an item. This may cause the time cutoffs to not be 100% accurate, but it should be close enough anyway. It was done this way to allow setups like the freezer example above, where the item would need to stay in the freezer even though it will never go bad while it is in a freezer tile.
Source: https://github.com/MrHacky/rimworld-PerishableSpoilTimeFilter
