v3.6.6.9

New features

1. Sigmoid type can be also specified by the string/"sigmoid name" (not only by enum!)
2. add Sine-type sigmoid, based on (1+sin(2x))/2
3. add many new distributions
4. upgrade many distribution to use ew ase classes. Drastic reduction of code lines.
5. add "folding" for RooDataSet and extend the corresponding test
6. add dump and dump_table methods to RooDataSet to dump the content of dataset in a table form
7. fix shared_entries and shared_data methdos for RooDataSet
8. major upgrade for pdg_format utiilty: reduce code & improve fuctionality
9. add PDG option for pretty-print functions for VE, VAE and VME objects

Bug fixes

1. Fix recently introduced bug (thanks to @DmitryYuGolubkov Dima Golubkov)
2. Fix Ostap::Math::(ln,i)beta

Backward incompatible

1. split command-line option --macros into two options: -l/--load-macros and -x/--exec-macros for the lists of ROOT/C++ macros to be loaded via ROOT.TROOT.LoadMacro and list of macros to be executed via `ROOT.TROOT.Macro``
2. rename scale for ResoGauss2 into sigma_scale
3. for several distributinos change the parameters from "X" to "logx"
4. rename Burr -> BurrXII