Deprecated the table extraction of yields, now they are got directly from the root files. Also, systematics names have been standarized
Standarize systematic names and getting ready the systematic_mod module to be deprecated. From now on, using the local systematic_mod module
Generalize script to be able to extract any general sample to any other sample. Not fully accomplish... yet
Adapting xscalc and bluemethod scripts to the new systematic_mod