TreeTrigger: Added branches: mc_evt_id, mc_rnd_id for pluto MC true information matching.

These branches get filled with ID numbers then creating
pluto data (using the "split_pluto_events" program, for example).
Then they get passed through a2geant and acqu. Using these you can then
later check that the reconstructed events match with the events stored
in the pluto mc true tree when combining.
Added Pluto Tree
Added random ID to GPlutoTree.
CMakeLists.txt: Clean up output and fixup
Added GTreeA2Geant