make group permission for CELL, output directories

scripts/prepare.sh

@@ -9,6 +9,7 @@ do
     if [ ! -d ${d} ]
     then
         mkdir ${d} 
+        chmod -R g+w ${d}
     fi
 done
 
@@ -50,5 +51,4 @@ for f in env_setup.sh run_index.sh DETECTOR_DISTANCE.txt BEAM_ENERGY.txt
 do
     chmod g+w $f
 done
-chmod -R g+w CELL