revised default arguments; line_color_map can be "none"; using non-matlab color line scheme when there are too many lines; fixed some bugs in setting time/date x-axis labels; empty plot_x/y_labels leave whatever is already there ("none" removes them); implemented zero and opt keywords in colormaps; legend is not shown if plot_legend_location is "none"; implemented general legend entry alignment.
revised default arguments; line_color_map can be "none"; using non-matlab color line scheme when there are too many lines; fixed some bugs in setting time/date x-axis labels; empty plot_x/y_labels leave whatever is already there ("none" removes them); implemented zero and opt keywords in colormaps; legend is not shown if plot_legend_location is "none"; implemented general legend entry alignment.

jgte/orb,jgte/orb,jgte/orb,jgte/orb,jgte/orb