Nice Progress Bar function by Jeremy Scheff

http://www.mathworks.com/matlabcentral/fileexchange/32101-progress-monit
or--progress-bar--that-works-with-parfor
Reco: parallelize Similarity Matrix computation
Reco: fix Fisher transform
Reco: tweak values
Reco: `diagnoseError` aligns test errors with train counts
Reco: fix Head / Tail edge case
Reco: normalization now centers the data