move unported algorithms into 'todo' directories to separate them from finished code

...lgorithms/far_forward/src/todo/FarForwardParticlesOMD.cpp

...gorithms/pid/include/algorithms/pid/todo/FuzzyKClusters.h

...hms/pid/include/algorithms/pid/todo/PhotoMultiplierDigi.h

...hms/pid/include/algorithms/pid/todo/PhotoMultiplierReco.h

...ithms/pid/include/algorithms/pid/todo/PhotoRingClusters.h

external/algorithms/pid/src/todo/FuzzyKClusters.cpp

external/algorithms/pid/src/todo/FuzzyKClusters.h

external/algorithms/pid/src/todo/PhotoMultiplierDigi.cpp

external/algorithms/pid/src/todo/PhotoMultiplierReco.cpp

external/algorithms/pid/src/todo/PhotoRingClusters.cpp

...ing/include/algorithms/tracking/todo/SiliconTrackerDigi.h

...clude/algorithms/tracking/todo/TrackerHitReconstruction.h

external/algorithms/tracking/src/todo/SiliconTrackerDigi.cpp

...algorithms/tracking/src/todo/TrackerHitReconstruction.cpp

...ithms/truth/include/algorithms/truth/todo/ClusterMerger.h

.../include/algorithms/truth/todo/InclusiveKinematicsTruth.h

...ithms/truth/include/algorithms/truth/todo/MatchClusters.h

...h/include/algorithms/truth/todo/ScatteredElectronFinder.h

...nclude/algorithms/truth/todo/SmearedFarForwardParticles.h

...hms/truth/include/algorithms/truth/todo/TruthClustering.h