Draft: Add new code to allow creation of electron and muon free particle flow jets
This includes updates to JetPFlowSelectionAlg.cxx to add options to remove all neutral contributions from particle flow jets that belong to electrons or muons of a given particle ID level.
On the python side new configuration functionality has been added to allow users to make use of these workflows.
This should not change the output of standard particle flow jets and hence should preserve frozen tier0.