1) add in function 
hra_core.datetime_utils.get_time_label_parts_for_miliseconds(
	miliseconds, hour_label='H', minute_label='M', second_label='S')
new parameters to give ability to define custom time units labels

2) add new Poincare plot parameters used to customize generation of
mini-Poincare plots in context
of time labels and size of fonts used in the plots:
-movie_hour_label
    label of hour in a Poincare plot [optional]
-movie_minute_label
    label of minute in a Poincare plot [optional]
-movie_second_label
    label of second in a Poincare plot [optional]
-movie_time_label_in_line
    draw time label (hour, minute, second) in one line at a Poincare
plot [optional]
-movie_time_label_font_size
    movie time label font size [optional]
-movie_time_label_prefix
    movie time label prefix [optional]
-movie_title_font_size
    movie title font size [optional]
-movie_axis_font_size
    movie axis font size [optional]