adding hide_grids argument to img_plot() and contour_plot() methods so that users can override the default behavior of hiding grids
adding hide_grids argument to img_plot() and contour_plot() methods so that users can override the default behavior of hiding grids

burnpanck/chaco,burnpanck/chaco,tommy-u/chaco,burnpanck/chaco,ContinuumIO/chaco,ContinuumIO/chaco,tommy-u/chaco,ContinuumIO/chaco,ContinuumIO/chaco,tommy-u/chaco