add demo link

README.md

@@ -1,5 +1,7 @@
 Simple proof of concept converting JSON data into case classes.
 
+[Demo](https://chadselph.github.io/json2classes/)
+
 Literally just brainstorming as I code so it's a total mess still.
 
 Does best effort for unifying json types... i.e. ```
@@ -13,4 +15,4 @@ snake_case keys to camelCase and some other basics.
 
 Also the web demo should be a separate sbt project so
 the main stuff can be crossbuilt, and all of the html/js
-should be rewritten in scala.
+should be rewritten in scala.