v1.9.7.8

v1.9.7.8

New features:

1. tweak D-integration for Ostap::Models::Shape(1,2,3)D` objects
2. add new test for 2D -sahpes test_fitting_shapes2.py
3. add new keyword recover = ... for PDF.fitTo that is expanded to ROOT.RooFit.RecoverFomrUdnefinedRegions ( ... )
4. fix the names for internal integration functions to be coherent with underlying GSL methods
5. disable Shape(1,2,3)D_pdf for old versions of ROOT
6. add Histo(1,2,3)D_pdf objects
7. extent printout for RooPlot objects
8. H(1,2m3)D_pdf - do not declare themselves as signal` components
9. replace Gauss-Kronrod integration by Romberg integration for Histo(1,2,3)D objects

Backward incompatible:

Bug fixes:

1. fix Ostap::Utils::hahs_histo and Ostap::Utils::hahs_axis