gplot23D: a better gplot
gplot23D: a better gplot

Heavily modified from
http://www.mathworks.fr/matlabcentral/fileexchange/13169-gplot23d

Signed-off-by: Jean-Yves Tinevez <e56a6ee37544ca2467315a0f3163c8180fa84354@pasteur.fr>

tinevez/jyt-matlab,tinevez/jyt-matlab,tinevez/jyt-matlab,tinevez/jyt-matlab,tinevez/jyt-matlab