Changes in version 4.2.0:

NEW FEATURES

    o   'localCurvature' function for computing local curvature along a
	line (J. Barry)

SIGNIFICANT USER-VISIBLE CHANGES

    o   the range of pixel coordinates displayed in the JavaScript viewer
	is now (1,1):(w,h) rather than (0,0):(w-1,h-1) and matches the
	indices of the corresponding Image array

BUG FIXES

    o   'erode'/'dilate': fixed a bug introduced in the previous version
	(4.0.0)

    o   'resize': new image width was calculated incorrectly when only
	height was provided (reported by B. Fischer)

    o   'medianFilter': incorrect [0:1] <-> integer range conversion
	(thanks to K. Johnson)