fixed bugs in default output, was not returning new image
added plot freature, now uses median filter with apparenly decent results
fixed small typo that was not causing negative effects
changed natural scaling length from R_pet circular, now using length of lower order skel, removed log now just a fraction
fixed integer division bug in skeleton, still having issues with M statistic so removed for the time being
smoothness now included in module
M statistic and S on line and printing to output catalog