remove in functions:
generate_movie
generate_multiprocessing_movie
module hra_core.movie_utils use of parameter output_prefix; a prefix has
to be included in movie_name parameter

add a new function 
hra_core.io_utils.get_filename(_file, with_extension=False)
which returns filename part of full pathname

add a new boolean movie parameter named movie_prefixed_by_source (with
default value True)
	if true then all intermediate frame files and output movie filename
        is prefixed by a name of a source file (minus extension)
changes in modules:
hra_math.model.parameters.movie_parameters
hra_math.time_domain.poincare_plot.poincare_plot
hra_math.time_domain.poincare_plot.poincare_plot_movie_maker

add during creation of poincare plot movie information about source
pathname (expressed by variables named reference_filename)