added singularity-exec script

singularity-exec

+#!/bin/bash
+if [ -d "$1" ]; then
+    wd=$1
+else
+    wd=$(pwd)
+fi
+set -- "${@:2}"
+userhome=$(ls -l "$HOME" | cut -d ">" -sf 2)
+userhome=${userhome## }
+singularity exec --writable-tmpfs -C --env "USER=$USER" --nv --pwd "$wd" -B "/home/$userhome/" -B "/etc/OpenCL" -B "/home/$userhome/.ssh:/.ssh" -B /projects -B /scratch "$@"
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