Draft: adding in inclusion of electons and photons close to muons for FSR reconstruction in PhysLite

For PhysLite, adding in a selection of photons and electrons which are close to a muon to allow FSR reconstruction. This is useful for H4l and Hmumu final states which allow, for example, to improve the mass resolution for the Higgs mass measurement in the former and the observation in the latter.

Adding AsgDeltaRSelectionTool to use with AsgSelectionAlg to be run after the standard el/ph selection. The "OR" of the two selection algs for each el/ph is handled inside AsgDeltaRSelectionTool.