r21 tag (PanTauAlgs-01-00-03)

	* Tagging 01-00-03
	* Adapted to TauJet_v3
	* changed name of PanTauSeed/TauConstituent/TauFeature --> ""2 in order to protect against duplicat class conflicts with PanTauEvent

2016 April 27 Lara Schildgen <schildgen -at- physik.uni-bonn.de>
	* re-structured PanTau packages (merged packages PanTauEvent, PanTauInterfaces and
	PanTauAnalysis into PanTauAlgs and removed PanTau packages PanTauExample and PanTauUtils)
	* re-organization of PanTau tools (removed FourMomentumCalculator)
	* tools rewritten to be dual-use
	* replaced CLHEP by TLorentzVector
	* tools rewritten to use 2D instead of 3D impact parameter
	* merged interface classes in ITool_DetailsArranger.h, ITool_DecayModeDeterminator.h and
	ITool_FeatureExtractor.h into one file ITool_PanTauTools.h


Former-commit-id: cedf26e7a6da21e008262d1c1fefec1d764ad967