add the ele ID output tree
add the basic overlap method
add the candidate sorter and the candidate combiner
move to the base classes in order to use the CandidateCombiner
move to the base classes in order to use the CandidateCombiner
add the default constructor
fix the charge and the momentum of the composite
clear the input collections in the constructor
cosmetics
add the usage of the combiner and sorter
Merge pull request #11 from VecbosApp/edm-electron-ntupler

Add the Candidate Combiner and the Candidate Sorter. Use them as example in the DYee selector. Add the output tree format for the electron tuple