added the plot_line_color_order global option; added default to line_handles method; separated the part the defines the color of lines from the line_color method into the line_color_map method and revised the color order code; added optional output to the line_color_set_last method; added plotting.legend to the enforce method; using str.none where appropriate; implemented the legend_replace_clean method
added the plot_line_color_order global option; added default to line_handles method; separated the part the defines the color of lines from the line_color method into the line_color_map method and revised the color order code; added optional output to the line_color_set_last method; added plotting.legend to the enforce method; using str.none where appropriate; implemented the legend_replace_clean method

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