Data analysis tutorials

Various examples of data analysis workflows.

Topics
	RDataFrame analysis tutorials
	These examples show various features of RDataFrame: ROOT's declarative analysis interface.
	TTree analysis tutorials
	These examples show various data analyses with TTree.
	TUnfold tutorials
	Test programs for the classes TUnfold and related.
	Parallel analysis tutorials
	These examples show data analyses with explicit multithreading and multiprocessing.