improved tissot's indicatrix function
improved tissot's indicatrix function

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