Histogram booking/normalisation issues in ZEUS_2004_I649041

Ran this with Herwig and looks like the high xgamma plot should be 2,1,2 rather than 3,1,1 with all subsequently booked plots off by one. All paper states the vs Et and rapidity plots are double differential in Q2 and Et or rapidity. Therefore I think the histograms should be divided by the Q2 bin widths. Also units missing on x/y axes of the plots.