Use RSS instead of centroid movement as condition
Use RSS instead of centroid movement as condition

Remove:
 * The use of centroid movement as the terminating condition
 * The movement bar chart (was the wrong measure)
 * Method to calculate the centroid movement

Add:
 * Method to calculate a cluster's Residual Sum of Squares (RSS)
 * The sum of the RSS values as the terminating condition
 * Graph of the sum RSS values in a bar chart

kevinjalbert/kmean_clustering