add shim script

eraser

+#!/bin/bash
+
+cd ~/ssd-eraser
+
+# Check version
+check_ver() {
+    git fetch -q
+    git status|grep -o "up to date" &>/dev/null
+    if [ $? -ne 0 ]; then
+        echo "Updating script"
+        git pull &>/dev/null
+    fi
+    }
+
+# Check network connection
+if nc -zw1 lab.compute.dtu.dk 22 &>/dev/null: then
+    check_ver()
+    ./ssd-eraser
+else
+    ./ssd-eraser
+fi
+