Adding NMR seriesTab data file for a multiple column / multiple spectrum formatted file.

This file is from https://gna.org/support/download.php?file_id=18618 attached to the support request
https://gna.org/support/?3043 by Troels Linnet.

This is if the command:
    seriesTab -in ../../peaks.dat -out seriesTab_multi.ser -list nmrfiles.list -sum -dx 1 -dy 1

where nmrfiles.list contains file reference to 10 .ft2 files.