Update GofTest to speed-up sigma calculations of AD test statistic for large N. Use approximate formulae for large N (N > 2000)
New version of TH1::Smooth copying from original Cernlib implementation. Add in a new correction for a non-negative result.
This should also fix ROOT-6906
Include a tutorial for smoothing
Use  <= instead of < in the quadratic interpolation. This has been suggested by E. Robutti (see ROOT-6906). The smoothed histogram looks better with the change, and checking in original implementation (hsmoof) <= is used instead of <.
Add a global flag in RooStats to use Offset in the negative likelihood to improve numerical stability of fits (RooStats::UseNLLOffset() ).
At the moment the flag is use in the AsymptoticCalculator and in the ProfileLikelihoodTestStat
Revert previous changes in ProfileLikelihoodCalculator. It was added by mistake (this fix commit 5cdbadfd94cfc54066475782550a4c998dc1c096 )
Implement the possibility to use option Offset() also in PLC
Improve message printing when running Hesse