assignment due 8/4, 1NN. Comments are in the file.

Hi, @ajschumacher and @sinanuozdemir.  I didn't know how to make the dataset available to you ( I should have asked!)  except to give the URL - yes, the second one.  I describe it in lines 25-38.  And, you're right, I didn't say which of those files to use - sorry. The pre-processing steps, in gory detail, are in lines 39-103.  There I reduce the # of vars, reduce the number of recs, and split it into training and test sets (3/4, 1/4).  I did a systematic sample for this and the summaries show that the reduced sets all match the original data set quite well.
I should have put the main function at the top, the helper fn, distance, below it, and the data prep steps below.   I think that would have made it easier for you all to read.  Thanks, both, for looking at this so carefully!