Several changes:

Several changes:
1) AddTaskPartCorr.C: The analysis train will call this macro to execute the tasks
2) Readers: Memory transient objects removed, now clusters and tracks selected and used in analysis are in TRefArrays.
3) AliAnaPi0.cxx: Protection added agains floating point exception when calculating the rapidity for MC particles
4)AliChargedParticles: New class for charged tracks selection for correlations.
5) Few coding violations  removed
6) In AliAnaParticleHadron* and AliAnaParticleJet* added option to fill histograms when trigger particle is isolated
7)AliAnaParticle* and AliIsolationCut: When adding clusters or tracks to reference lists in AliAODParticleCorrelation, use new with placement.