refactorings in parameters classes, move all parameters classes:
CoreParameters
DataVectorParameters
FileDataParameters
FilterParameters
MovieParameters (changed name from PoincarePlotMovieParameters)
PoincarePlotParameters
StatisticParameters
into separate modules in package hra_math.model.parameters

add a new class 
hra_math.model.parameters.poincare_plot_parameters_manager.PoincarePlotParametersManager
which has as parent classes all specific parameters class, include
methods which operates on all  parameters classes

add new module:
hra_math.statistics.statistics_utils
used as a place for some statistic's utils functions