Fix type of variable for histograms with large number of entries.
add python script to extract top twenty ROOT developers according to gitstats.

Also add new option -ncpu to root-config reporting the number of
(hypethtreaded) cores in a machine independent way.
don't make special mention of documentation anymore.
remove obsolete comment.
correct --ncpu explanation.
Doc update
Pick up libCling from ROOTLIBDIR if configured with prefix.
Do not search through DY*_LIB*_PATH if ROOTLIBDIR.
In Print, use the fast screen copy for binary images when not in batch mode.
Move opaque was not properly working in case of X11.
Fix excessive selection and selection of * and & field types

o Generating the pattern for matching properly
o Getting the pointee out of the name
Now SelectionRules populate the template/nargs to keep map

Atlas requested the ability to exclude a class preserving the
decoration expressing the number of args to keep.
Re-implement TMath::RMS using the two pass algorithm which is much more precise than the previous one-pass methods using the sum of squares. This method is maybe slightly precise than the Welford (Knuth) algorithm but at least  factor of 2 faster.
This fixes ROOT-5545
Improve CPU time measurement
Remove mistake altering accuracy near zero
Fix a compiler warning
Fix ROOT-6004: exclusion with pattern on names & typedefs for sel
Avoid double cloning of histograms
First round of optimisations for the pch generation

a factor of 2 was gained in speed. Not clear how it got so slow
in the past. Probably because of the implementation of the features
of the DictSelection.
The timing for a debug build went from 460s to 255s.
Correctly do not assume order of iotype and ioname properties

this lead to not compilable dictionaries.