ABCNet-compatible code

[fiemmi]

Implemented changed to the code to run on custom JMENano samples containing ABCNet jet collections.
Most of the changes consist in triplicating the code to run on CHS, PUPPI and ABC at the same time. A few points to be kept in mind are:

1. All jet collections are currently non-corrected (JECs are not implemented). This is due to the fact that ABC has no dedicated JECs (derivation of those to be discussed);
2. The command sed -i 's/"fixedGridRhoFastjetAll"/"Rho_fixedGridRhoFastjetAll"/g' bamboo/bamboo/analysisutils.py suggested in the readme has to be reverted to have this run (it runs on Run2-like JMENano)