Draft: ParticleRangeFilter and ParticleCombiner overlap algorithm
This merge adds the algorithm used to generate overlap histograms mentioned in this Moore issue: Moore#948. The algorithm takes a vector of ParticleRangeFilter and ParticleCombiner outputlocations, from these algorithms it generates per event unique string ids on the form: "ParticleRangeFilter_64adf3:5FunctionalParticleMaker_ae3465:8". These ids can then be compared between algorithms to see how many candidates are shared between them. A 2d Gaudi histogram is iterated and the output is sent to a Json file.