fix bug of DAQ
save h_mod
change vmin and vmax for BB
use fin
add hdiff
first compiled version
able to open two files
get nbinx and y
fill the hdiff, but not vlaue there yet, need to debug
Merge branch 'master' of https://github.com/puhep/cmspxl
rain bow palette
save hist
make the diff
set the min and max