Update the readme

Author: mfauveau

readme.md

@@ -1,7 +1,9 @@
 Angular Query Builder
 ======================
 
+*Demo:* http://mfauveau.github.io/angular-query-builder
+
 This is a sample HTML / JavaScript application that demonstrates how to use
 Angular.js to create a dynamic query building web UI.
 
-This was inspired by https://github.com/kindohm/knockout-query-builder
+This was inspired by: https://github.com/kindohm/knockout-query-builder