Changes in version 1.9-13 (2018-05-25)                 

    o   fixed prediction for forward warping (contribution by Sergio Oller)

    o   updated author list in DESCRIPTION

                 Changes in version 1.9-12 (2017-03-06)                 

    o   implementation of ptw for peak lists: stptw and associated
	functions

    o   addition of vignette

    o   removal of obsolete function interpol, replaced by approx

    o   new maintainer