Added filling of bch_corr_cell to jets.

The corresponding D3PD variable is BCH_CORR_CELL,
which allows study of the new BCH cleaning.
Added random run/lb numbers for MC

Using TPileupReweighting, random run number and lb number
can now be computed using the luminosity fractions known
to TPileupReweighting. This feature is needed for the jet
BCH cleaning cut flags.
Added filling of jet BCH cleaning cut flags

BCH cleaning cut flags for medium, tight, and the systematic variations for medium are saved.
calcRandomRunLB is called first to compute random run/lb numbers for the MC
Only call calcRandomRunLB on MC
Added NtMaker test script, updated fileList for afs D3PD
fix filelist in script
Updated ele medium SF file
Updated usage of SUSYObjDef::initialize.

Was previously using manually set file paths in the initialization,
and not supplying correct arguments for SUSYTools-00-03-19.
I've now removed the file paths and fixed the arguments, with one caveat:
We need to implement a prescription for identifying a sample as MC12b.
This is now an argument to SUSYTools. I've set the arg to false for now,
but this will need to be fixed soon.
Updated criteria to determine if sample is SUSY MC.

Found that it's insufficient to simply ask if the SUSY_SpartX_pdgId
branches are "available" in the D3PD, so I am now additionally checking
that the pdgId values are nonzero.
fixed units in BCH cleaning tool calls
Updated electron pt cuts to reflect official SFs.

Electrons with pt below 7 GeV were giving many errors when running the NtMaker.
Since reco/ID efficiency scale factors are not available for electrons with
pt between 6 and 7 GeV, I've simply raised the requirement. In addition,
when doing the systematic shifts some electrons can survive with pt < 7 GeV,
so I fixed this by setting the pt to 7 GeV for these electrons manually.
These are all electrons very near threshold, anyway, so using 7 GeV when the
actual nominal pt is 6.95 GeV should be fine. In fact, nobody is seriously
using these low pt electrons for an analysis right now anyway.
Merge pull request #3 from gerbaudo/bch-cleaning

Bch cleaning