fixed FindCenter refactor.  Renamed virtual functions
implement FindCenterMean
implement basic cluster algorithm
fix naming bugs in FindCenter.  fix matrix setup issues in findCenter() function.
calculate mean of images in cluster
comment debug code
working with 2 clusters
save previous label name show to user on next save
fix save/load Object.  had parameters in incponsistent order
save clusterID AFTER finding the clusters ;)
bug fix: pass numClusters to findCenters.  Adjust number of clusters.
if a cluster is empty, return a teplate with a solid color that's not black.  matchTemplate returns a 1 when matching against a solid template