New Ecal Local Reconstruction with Multifit

Adds additional EcalUncalibRecHitWorker for MultiFit (using Fast NNLS algorithm) and modifies appropriate sequences to activate it by default.

@argiro @emanueledimarco
@Dr15Jones is it possible to increase a classversion if the data members  are unchanged?
Here, packing of some useful data is done in an extra_ data member.

If version support were needed, I guess a solution would be to create transient data members (ootEnergy, energyError) and fill them depending on the version.

SUSYBSMAnalysis/HSCP/src/BetaCalculatorECAL.cc is in for a little surprise at some point soon