git-svn-id: http://root.cern.ch/svn/root/trunk@44191 27541ba8-7e3a-0410-8455-c3a389f83636

  from 43442 to 43445 committed by  G. Lewis: 
 
-  Removed Warning in RooStats HistFactory ConfigParser.cxx
- Updated HistFactory xml Parser, Added support for scripting, added various helper classes

from 43455 through r44158  by G. Lewis and Kyle Cranmer

new shape interpolation option

Updated histfactory: Streamline HistoToWorkspaceFactoryFast, MakeMeasurementAndModel, return workspace pointer


git-svn-id: http://root.cern.ch/svn/root/trunk@44159 27541ba8-7e3a-0410-8455-c3a389f83636