added download/unpack scripts

scripts/unpack.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+# Usage: ./unpack.sh filename.zip
+# Usage: ./unpack.sh filename.zip /home/user
+FILENAME=$1
+
+if [ "$#" -gt 1 ]; then
+    DESTPATH=$2
+    unzip -d ${DESTPATH} ${FILENAME}
+else
+    unzip ${FILENAME}
+fi