harvest and replant

[SamOphis]

It's quite annoying having to go over a big wheat farm two times just to replant seeds, so a feature to break the crop and then replant would be quite nice

Im sure more people would like this approach too

[broman]

Might work on this over the weekend, will have to figure out how to determine which faction owns a given block. No promises on a deadline

[queer]

Merged in a54c86c