By default, make slim CMG Tuple

Turn on the following slimming options in the top-level cfg file
  - 16bit PF Candidates instead of 32 bit ones
  - TriggerPrescales instead of fat single TriggerObject
  - slimmed PVs (without track references)

For the 16 bit candidates, in the absence of any other validation, I checked that re-reconstructing the ak5PFJetsCHS and ca8PFJetsCHS (both pruned and not pruned) from the 16 bit candidates the &eta; and &phi; are reproduced to an absolute accuracy of about 0.0001, and the p<sub>T</sub> and mass are similarly reproduced with a relative accuracy of ~0.0001.
A few plots:
   http://gpetrucc.web.cern.ch/gpetrucc/drop/plots/16bit/?match=ak5PF*_hD
   http://gpetrucc.web.cern.ch/gpetrucc/drop/plots/16bit/?match=ca8PFJetsCHSpr*cM
   http://gpetrucc.web.cern.ch/gpetrucc/drop/plots/16bit/?match=ca8PFJetsCHSpr*DMR
   http://gpetrucc.web.cern.ch/gpetrucc/drop/plots/16bit/?match=ca8PFJetsCHSpr*DPt
(note: uncorrected jets, with a only a minimal selection, no jet id, no pu id, no cleaning of leptons...)