BDT and (not yet) PID with adaptive binning

First step to implement the adaptive binning in the yield computation: new scripts to make BDT and PID efficiency plots, out of the effLUT library.

The creation of these plots was made within effLUT, but to don't make too heavy the code of that library (to make the adaptive binning coexisting with the TEfficiency implementation), is simpler to move that part of the code in two simple separate scripts. The original code in the effLUT is still there, it will be removed in the next MR.

The PID efficiency cannot still computed with the adaptive binning, which up to now is only implemented for the 2D case.