Adding pFlow jets to EXOT6
pFlow jets (one of the two currently recommended jet types of the Jet/Etmiss group and the default jet collection in the near future) has been added to EXOT6. At the same time, R = 0.4 LCTopo jets (which are not supported anymore) were removed. Thus the size of the EXOT6 derivation stayed approximately the same (this has been tested for both data and MC)