Heppy: add xsection
Heppy: add timing
Merge pull request #180 from mariadalfonso/TimingXSec

Heppy: Timing and Xsec
Heppy LeptonAnalyzer: updates and more sensible defaults:
- include EAs for isolation in Phys14 25ns samples
  (Data2012 ones are also provided)
- fix electron isolations for R=0.4: before deltaBeta was dummy,
  and rho*EA was using the R=0.3 effective area
- the deltaR cut in the electron-muon cleaning was applied to
  deltaR2 instead of to deltaR, now fixed.
- the default electron tight id was 'MVA' but MVA Id is not yet
  in Heppy so it was dummy: switched to Cuts_2012
- Cuts_2012 electron tightId moved to full5x5 clusters
Merge pull request #181 from gpetruc/heppy_7_2_2_patch2

Heppy LeptonAnalyzer: updates and more sensible defaults:
Heppy: fix application of jet energy correction, and allow specifying to recalibrate only data or only MC
Heppy: Working points for the combinedMVABJetTags tagger (preliminary)
HeppyCore: allow splitting a file in multiple chunks

This feature can be enabled by setting fineSplitFactor = N > 1 on
a component. In that case, the scheduler will make N jobs for each
file, and each job will process 1/N of the events in the file.

To avoid code duplication, now heppy_batch takes the split function
from heppy.

Also, the print out of the time per event has been updated in order
to work correctly with this feature, or in general when not processing
events starting from the first one in the file.
Merge pull request #184 from gpetruc/heppy_7_2_2_patch2

Fix JEC, allow sub-file split, test CMVA working points