showNy		'back-fits' of Richards curves with plots
contourModified	Contour plot of derivatives of 'SSrichards' and simple version of 'SSrichards'
sourceNy	Source code for (simple versions of) 'SSny?' with fixed 'ny'
sourceRichards	Source code for simple version of 'SSrichards' and 'SSrichardsE', etc.
sourceModified	Source code for the 'modified' 'SSrichards', 'SSnyFixed', etc.
sourceNyExtras	Additional selfStart's with fixed 'ny': The 'modified' are not tested!

