function [nTime, nSig] = li_liio_read(sFilePath)
reading a ".liio" signal-io file to a matlab variable.
Expecting a ".liio" file name to read from as the only input argument. Naturally, a valid ".liio" file is expected.
If the function is called from matlab with two output arguments, the first one will be a column vector of time double representing the time stamps and the second a column vector or matrix of the basic type representation used in the referenced ".liio" file.
If the function is called from matlab with only one output argument, a double matrix is returned. This matrix contains a time stamp in its first column and respective signal vector data in the following columns. Thus each line of the matrix contains a time value in its first element, and the signal vector elements for the respective time step in its successing elements.