give ability to calculate poincare plot statistics/descriptors for the
while recording,
without limiting to specific window data size:

1) package hra_math.time_domain.poincare_plot.poincare_plot:
change poincare plot parameter -w into full named parameter -window_size

2) class
hra_math.model.parameters.data_vector_parameters.DataVectorParameters:
change requirement of window_size poincare plot parameter, 
it is optional parameter now, if it is not specified, the whole
recording will be used in one run

3) package hra_math.model.data_vector_segmenter:
- extract common segmenter functionality into new class
__CoreSegmenter__
- add new segmenter class __OneRunSegmenter__ used when no window size
is specified,
   this segmenter runs only once and returns the whole data