add LiveScript mode

As it says, add a LiveScript mode.

I had a nightmare with this essentially trivial addition because I kept getting requirejs time-outs launching node-webkit from a windows environment with the code on a Linux VM.

It might be nice to bundle and minify all the code à la browserify but you do quite a lot of dynamic code loading based on configuration. The same behaviour could be created while having all the code in a single bundle. Something to consider for the future as the code base grows.