SusySelection: add counters for control regions
define and implement SusySelection::passAndIncrementCr*
SusyPlotter: passCrWh* -> passAndIncrementCrWh*
define SsPassFlags::passCommonCriteria, call it instead of passLpt (bugfix?)
avoid recomputing veto3rdL
hack MeasureFakeRate2 to passCommonCriteria; needs better solution
determinFakeScaleFactor: fix SidebandError (thought I had done it already, see email 2013-11-06)
update to Feb_10 matrix (after passCommonCriteria fix)
Merge remote-tracking branch 'origin/lea-region' into dbg-cr-yields

Conflicts:
	Root/SusySelection.cxx
	SusyTest0/SusySelection.h
alias namespace
MeasureFakeRate2: clarifications

Details:
- clarify that we're using the local getEvtWeight
- clarify that we're using the local passWhSS
- make clear that all the signal regions have 2L SS (some of them use
  the flags, other kin vars, so it was confusing)
MeasureFakeRate2: hack the hack

Details:
Because the flags are computed by MeasureFakeRate2::passWhSS, the
`passCommonCriteria()` and `l3veto` introduced in 99df30710 were
just wrong.

Revert that hack by actually checking the requirements we need
(mainly vetoes and ge1j).
Now our sr/cr histos are not empty anymore.
fill histos for SsEwkLea (requires SusyMatrixMethod >= 26d9cd9)
fill histos for PR_CRSsInc1j (requires SusyMatrix >= 8434158)
buildWeightedMatrix: also plot SSInc1j and SsEwkLea
fix CR Lea : m_ll >20
add 2d eta_vs_pt param
numpy not available with localSetupROOT; catch ImportError
implement getBinIndices: useful to trasnparently deal with TH1/TH2/TH3
also build and plot 2d weighted matrices