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