Application.js not being loaded

I'm using rails 4.1.8 with ruby 2.2.0 - it seems like my application.js file is not being loaded. I put up a question on Stack Overflow yesterday but it's getting little attention and it's a matter of some urgency that I fix this. I have a simplified version of my project up on a public github repo here:

https://github.com/sheekap/test

And here's a link to my original question on SO and everything I've tried so far to debug/fix this:

Hopefully someone here will be able to help with this problem!

Is this in development or production mode? Have a look at the html source in the browser, what do you see there? Copy/paste the beginning of that here.

Colin