Add npm modules for running HTTP server

Add two npm modules
  connect: HTTP server framework
  serve-static: static contents server middleware
Create web server

Create HTTP server using previously installed npm modules.
Create websocket server and send packet information.

Create WebSocket server with npm module (ws) and add packet capture
session using npm module (node_pcap).
Create GeoLite2 downloader

Create GeoLite2 GeoIP database by MaxMind downloader. Available from
http://www.maxmind.com
Add 'Thanks' section

Write thanks for providing me with a database of Geolocation.
Untrack 'GeoLite2-City.mmdb'

The newest GeoIP2 data will be downloaded at run-time. Therefore, it
should not be tracked by git.
Add location determination.

Add location determination using GeoIP2 database and maxmind-db-reader
module.
Change packet capture filter

Ignore broadcast and multicast packets.
Get IP address of server running

IP address of server will use filtering and so on.
Store settings in configuration file

Using 'node-config' module, settings are stored in /config/default.json
Add public mode

Mask IP address to protect privacy.
Add jQuery and Highcharts front-end library

Install jQuery and Highcharts for front-end development.
Add network access frequency graph

Add graph which shows network access frequency using Highcharts.
Add black and white earth image

The image, 'earth_bw.png' is converted with ImageMagick. The original
image is downloaded from NASA Visible Earth.
Add globe 3D model to show IP geolocations

Add WebGL rendered 3D model powered by three.js and locate geolocation
on 3D world globe.