updated CSV files for Assignment 3 from http://isites.harvard.edu/icb/icb.do?keyword=k97402&panel=icb.pagecontent1316346%3Ar%241%3F%243%3D%252Fasn3&pageid=icb.page607541&pageContentId=icb.pagecontent1316346&view=view.do&viewParam_directory=/asn3/data%20files#a_icb_pagecontent1316346