make editing the api server easier

- currently when a change is made to api-stub/routes the server has
  to be restarted. this change allows you to start the server with
  something like nodemon, e.g., npm install nodemon -g, then nodemon
  api-stub/server.js — then start the grunt task with `grunt server:proxy`

  make changes inside of the routes file and now the second server that
  we’re parodying to through will restart itself due to the fact that it
  was started with nodemon

does that make sense?

only important thing to remember is
`grunt server:proxy` make localhost:5000 and localhost:8000 provide the
same data, but 8000 will proxy to 5000, and 5000 is reloaded on file change
when starting the server with nodemon