Merge Hbb developments into master
There are quite a few changes here:
- add more support to run single b-tagging in the
dump-hbb
script - add dataset merging on the grid (for
dump-hbb
) - add list of most recent Hbb datasets
- changes to support the
schema
flags that we'll need for more recent derivations (where some variable names will change thanks to the retraining campaign)