mCBM 2020: bring task classes to mCBM branch stand

- CbmCheckEvents.cxx
==> AddMUCH + digi manager support
- CbmCheckTiming.h
==> Add TRD support
==> Change sign of time diff to have T0 as reference time
==> Set binning to clock cycle if compatible
- CbmMcbm2018EventBuilder.h
==> Add TRD support
==> Add support for CbmMuchDigi (Simu) + CbmMuchBeamTimeDigi (real data)
==> Better monitor histos handling
- CbmMcbm2019CheckPulser.h
==> Add support for TRD + selection by address for some of the detectors