Added analysis wagons for the global observables project
Added analysis wagons for the global observables project: MpdPtMultAnalysis by Vladimir Kovalenko, MpdPTNFluctCorr by Daria Prokhorova, MpdFluctPt by Evgeny Andronov, MpdPtAnalysis by Svetlana Simak, MpdCumulantAnalysis by Agnia Zviagina