[PWGJE] Updated jetD0AngSubstructure.cxx

- Added task to analyse D0 candidates from experimental data. Histograms for different observables such as angularity etc. are made for quick checking purposes.
- Added task to match detector level and particle level Monte Carlo particles.
- Added an additional task to calculate the Monte Carlo efficiency.
- Using templated analyse functions to easily define processfunctions for other particles than D0 if desired.

Author: Lolle2001