Includes fix to licence headers in reco, ana and plotting macros from NH version

1. Name collision with pl_eff_XY.C
   ```macro/beamtime/pl_Eff_XY.C    <= renamed to pl_Eff_XY_1.C by FLorian one year ago```
2. Beamtime folder
   ```
   macro/beamtime/kine.C         <= New file + HEADER
   macro/beamtime/pl_cmp_2D.C    <= New file + HEADER
   macro/beamtime/shift_hst.C    <= New file + HEADER
   ```
3. mCBM 2021 folder
   ```
   macro/beamtime/mcbm2021/MonitorTof.C            <= + HEADER
   macro/beamtime/mcbm2021/ana_trks_eval.C         <= -doxygen in HEADER
   macro/beamtime/mcbm2021/ini_AnaTestbeam.C       <= New file -doxygen HEADER + HEADER
   macro/beamtime/mcbm2021/ini_Clusterizer.C       <= New file + HEADER
   macro/beamtime/mcbm2021/pl_all_2D.C             <= -doxygen HEADER + HEADER
   macro/beamtime/mcbm2021/pl_all_CluRateRatio.C   <= New file -doxygen HEADER + HEADER
   macro/beamtime/mcbm2021/pl_all_Sel2D.C          <= -doxygen HEADER + HEADER
   ```