fixed bug in normalization
fixed bug in normalization

smerdis/pycortex,CVML/pycortex,gallantlab/pycortex,CVML/pycortex,CVML/pycortex,gallantlab/pycortex,smerdis/pycortex,CVML/pycortex,gallantlab/pycortex,smerdis/pycortex,gallantlab/pycortex,smerdis/pycortex,CVML/pycortex,gallantlab/pycortex,smerdis/pycortex