make MinDeltaRDouble useful for fragmentation, fix Z status bug
Created by: fojensen
added a status int to allow what sort of photon or Z is chosen to calculate deltaR with - for example, for fragmentation we would like to use photons that are radiated from quarks, not from meson decay
fix bug where I initially assumed the hard process Z had status 23, it in fact has status 22
for expected output on MC samples relevant to Zinv, see: http://www-hep.colorado.edu/~fjensen/28102016_deltaRVerify/