Starter Scheme file for assignment 7: Where Am I?
Create intersection-points function that returns a list of points of intersection if given a list of circles.
Create distance-product function that computes the product of the distances between a point and a list of other points.
Functions to rate a list of points based on distance to other points and sort the rated list.  Modification of quicksort and partition functions to take a comparison function.
Functions to clump close points together and compute the average of a group of points.
Final function to convert a list of distances and star locations into a set of possible estimates of your location, sorted in increasing order by distance.