Taking off with Node.

### Changes
    - Socket disconnection became noticeable to the server now
    - Added gitignore files
    - Modified the initiation part of socket.io
    - added some introductory contents to README
    - deleted the 'commit test' folder just for my 'commit test'

![11384898493_7dea41c994_m](https://f.cloud.github.com/assets/6221304/1811122/62d05e7a-6e46-11e3-9d2b-febb45f2be16.jpg)