Merged requested to merge erodrigu-issue-94 into master
As per our chats at #94 (closed), @amathad, @jzhuo and @pkoppenb.
We can already use this new module to test some ntuples in DaVinciExamples, DaVinciTests, etc. And we can expand with functions to return a list of branche names containing NaNs, for example. Ideas welcome.