modified scripts to plot TH decay and TZ decay in one execution and create opti...

...on to save in specified folders.

Specifically: 
in Plotter.C:
- I've added some lines so that we are able to plot TH/TZ plots instead of just either TH, TZ, BW or ALL. 
- I've added the option folder_name in makePlot() and makeStackPlot() to specify which folder to save the output files in.

in makeDataMCPlots.C:
- I've added lines to plot of decays=ALL, TH/TZ, and BW and save each in different folders under a parent folder named Plots.