Function popdat::distribute_people::distribute_population_to_homes

pub fn distribute_population_to_homes(
    polygon: Polygon<f64>, 
    population: usize, 
    map: &Map, 
    rng: &mut XorShiftRng
) -> Vec<(BuildingID, usize)>

Starting from some number of total people living in a polygonal area, randomly distribute them to residential buildings within that area. Returns a list of homes with the number of residents in each.