[RUNWAR] Allow to start a pure HTML server

Original runwar issue #135

It could be handy to have Runwar start up undertow purely to serve static assets like HTML, images, etc but not require a CF engine or java war. Is that possible? Would I just need to create a dummy war that had an empty WEB-INF/lib and a bare web.xml?

t would be great if I could start a-la-carte web servers that can be used to host front-ends. Even better would be to add them with websocket support, so I can start another server somewhere, which is cfml and pushes data to my websocket server as well.

However, for now, I just wanted a front-end server for static assets.