This reverts commit f1eaf4cf013e5f426e0b526a916edce4c0c97931.

 On branch 188-sibyll-decay-of-sigmabar0-yields-sigmabar0
 You are currently cherry-picking commit 9c650ba.

 Changes to be committed:
	modified:   Documentation/Examples/boundary_example.cc
	modified:   Documentation/Examples/cascade_example.cc
	modified:   Documentation/Examples/vertical_EAS.cc
	modified:   Processes/Sibyll/Decay.cc
	modified:   Processes/Sibyll/Decay.h
	modified:   Processes/Sibyll/Interaction.cc
	modified:   Processes/Sibyll/Interaction.h
	modified:   Processes/Sibyll/sibyll2.3c.f
	modified:   Processes/Sibyll/testSibyll.cc

(cherry picked from commit ae4b4c205f74a5e0ef0af6e4a680df79a81650cb)