Add materialmap script
Added a couple of root and python script for the material mapping.
The two python script are used to simplify the selection of the surface for the mapping, the first one (writeMapConfig.py) write a json file from a surface map which allow a define the binning for each type of surfaces for each volumes. The second use this json file to generate a new surface map that can be used in the material mapping.
The root script can be used to create the control plot for the mapping. Mat_map.C create general control plot while the other create plot for each layers.