Loading data from binary files

[h0pbeat]

sbs2sourcereconstruction.cpp is currently using text files in methods:

readForwardModel();
readPriorSpatialCoherence();
readPriorSpatialCoherenceInverse();

The files should be changed to binary files (maybe gzip compression?) so they are smaller and potentially faster to read in.
It would be nice to have a generic method for reading files into matrix: readData(filename, matrix)