Get demo working on Windows

- Removed bin bash scripts in favor of npm scripts so they work
  cross-platform
- Moved to use 127.0.0.1 as 0.0.0.0 doesn't work on Windows

Note that this doesn't work with the current pty.js as it doesn't build on
Windows.

bin/server

@@ -1,4 +0,0 @@
-#! /usr/bin/env sh
-
-# Development server for xterm.js
-node demo/app.js

bin/test

@@ -1,5 +0,0 @@
-#! /bin/bash
-#
-# Testing script for xterm.js
-
-node_modules/.bin/mocha $@