Modification of the plotDay function

More option are now available for the plotDay function.

x_labels_size
y_labels_size
title_size
line_width
subplots_adjust_left
subplots_adjust_right
subplots_adjust_top
subplots_adjust_bottom
tick_format
right_vertical_labels
one_tick_per_line
show_y_UTC_label
title