separate npm link script from start

scripts/start-linked.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+"$DIR/npm-link-demo-shell.sh"
+
+cd "$DIR/../demo-shell-ng2"
+
+if  [[ $1 = "-install" ]]; then
+    npm install
+    npm run start
+elif  [[ $1 = "-update " ]]; then
+    npm run update
+    npm run start
+elif  [[ $1 = "-cleanInstall" ]]; then
+    npm run clean
+    npm install
+    npm run start
+else
+    npm run start
+fi