add a new parameter named movie_dpi passed into 
hra_math.time_domain.poincare_plot.poincare_plot.PoincarePlotManager
as a dpi value of a poincare plot movie; changed parameter fps into
movie_fps

changes in hra_math.time_domain.poincare_plot.poincare_plot_movie_maker
module:
- add a new class MiniPoincarePlotSpecMinimum as a replacement for named
tuple PPSpecMinimum,
  this is a base class for MiniPoincarePlotSpec, 
- add new class MiniPoincarePlotSpec method 
   def __color_as_tuple__(self, _color), 
  use to convert numpy array defining a color to a python tuple

changes in
hra_math.time_domain.poincare_plot.poincare_plot_fast_movie_worker:
- use active_color_as_tuple, inactive_color_as_tuple,
centroid_color_as_tuple
	of  MiniPoincarePlotSpec class instead of hard-coded values to set up
colors of poincare plot elements
- use member manager.movie_dpi of MiniPoincarePlotSpecManager class to
set up dpi of a pincare plot movie