Single Event Mode has been implemented as TestRun() in MonteCarlo class. It has not been moved to ComputeObservables class since ComputeObservables can trivially generate a single event. The user can now test run their Monte Carlo implementation with a single event before then do a full run.
TestRun() support added:
Monte Carlo mode: analysis Model.conf MonteCarlo.conf [--rootfile <name>] [--job_tag <tag>] [--thRange]
Single Event mode: analysis Model.conf MonteCarlo.conf --test
Generate Event mode: analysis Model.conf --noMC [--it #] [--output_folder <name> [--job_tag <tag>]]