[Webnode] Fork Googles jank app and add the webnode script to it for manual stress testing

[jfarago]

https://github.com/GoogleChrome/devtools-samples/blob/master/jank/app.js

Clone repo, add our script, and then create a stop button to kill the treasure hunting.

Now that you can:

• Add and remove blocks to simulate various client demands
• Optimize and Un-optimize clients code
• Start and Stop treasure hunting

[tenisakb]

PR: #148