Created a *very* base skeleton using express-js

- Possibly need to establish an [editorconfig](http://editorconfig.org/) - sorry about the inconsistent newlines!
- Will need some mongodb setup to get running locally
- I copied Dave's CSS into a SCSS file (since that's what I usually work in), but we could still opt to use Less or Stylus if we want
- I'm not sure if I'm a fan of the view names "listener"/"viewer". Can be easily changed in the future