returns sample AFM image files included with this library
AFM.getSampleImages(type = "*")
could be "ibw" for Asylum Research, "nid" for NanoSurf, "veeco" for Bruker/Veeco image, "tiff" for Park, "force" for force spectroscopy, "resonance" for resonance curve, if empty or "*", all files will be returned
vector with path/filename to AFM sample images