add UnitGroup marker in the save stream
add UnitGroup marker in the save stream


thibmo/kam_remake,thibmo/kam_remake,Alexandr57/kam_remake,Alexandr57/kam_remake,reyandme/kam_remake,Alexandr57/kam_remake,Alexandr57/kam_remake,reyandme/kam_remake,reyandme/kam_remake,reyandme/kam_remake,thibmo/kam_remake,reyandme/kam_remake,thibmo/kam_remake,thibmo/kam_remake,Alexandr57/kam_remake,Alexandr57/kam_remake