Added user_version argument to several functions.

gen/obj_defines.h

niflib.cpp

niflib.h

obj/ABoneLODController.cpp

obj/ABoneLODController.h

obj/AKeyedData.cpp

obj/AKeyedData.h

obj/APSysCtlr.cpp

obj/APSysCtlr.h

obj/APSysData.cpp

obj/APSysData.h

obj/AParticleModifier.cpp

obj/AParticleModifier.h

obj/AbhkConstraint.cpp

obj/AbhkConstraint.h

obj/AbhkRagdollConstraint.cpp

obj/AbhkRagdollConstraint.h

obj/AbhkShapeCollection.cpp

obj/AbhkShapeCollection.h

obj/AvoidNode.cpp