This set of files is generated by CarrotCNV for GenomeStudio from one of the
PennCNV tutorial data set. (http://neurogenome.org/cnv/penncnv/tutorial_beadstudio.zip)
It is a new and more convenient file format and documented in
the accompanying python script "Carrot Python" Carrot.py . An R implementation
of it will go into snpMatrix.