Refactor multiple plot functions

[kaizu]

viz module supports multiple plot functions such as:

>>> dir(viz)
[...
 'plot_dense_array',
 'plot_movie',
 'plot_movie2d_with_matplotlib',
 'plot_movie_of_trajectory',
 'plot_movie_of_trajectory2d_with_matplotlib',
 'plot_movie_of_trajectory_with_matplotlib',
 'plot_movie_with_attractive_mpl',
 'plot_movie_with_elegans',
 'plot_movie_with_matplotlib',
 'plot_number_observer',
 'plot_number_observer_with_matplotlib',
 'plot_number_observer_with_nya',
 'plot_trajectory',
 'plot_trajectory2d_with_matplotlib',
 'plot_trajectory_with_elegans',
 'plot_trajectory_with_matplotlib',
 'plot_world',
 'plot_world2d_with_matplotlib',
 'plot_world_with_attractive_mpl',
 'plot_world_with_elegans',
 'plot_world_with_matplotlib',
...]

Those functions have similar interface and implementation. We need to refactor the code.

[kaizu]

See ecell4.plotting. ecell4.util.viz would be deprecated.