Python plothisto

The plothisto script is going to plot all the histograms named fHNameOfHistogram contained in the output root files delivered from the runanalysis for all the directories of type cluster_samplename found in the launching directory.

TO BE DEPRECATED: The script makes use of the module cosmethicshub_mod to map samples to colors, legends and so on. Therefore if you found a KeyError with the name of the sample it is possible due to that, so incorporate the sample name to the data members or the cosmethicshub_mod module.