project-py

Add command --merge to merge analysis HistRoot output.
The merge is done using hadd.

Required options to provide a SAM dataset are any of the following:

• --defname <SAM DATASET>
• --submission_id <submission_id>
• --campaign <campaign_name> --stage <stage_name>
• --stage_id <stage_id>

The optional option --mergetype takes as argument ntuple (this will be the default value) or hist.