[README] add demo link

fahrinh · fahrinh · commit 1149c5db85ac · 2017-02-25T21:18:48.000+07:00
diff --git a/README.md b/README.md
@@ -2,6 +2,9 @@
 
 > A Vue 2.0 project example to demo how to build a grid/table with inline editing support
 
+## Demo
+<https://sample-vue-grid-inline-editing.md101.duckdns.org>
+
 ## Build Setup
 
 ``` bash
