New Landing Page

I put all files into "Landing" directory in root. Here's a preview:

![screen shot 2014-11-22 at 2 55 12 pm](https://cloud.githubusercontent.com/assets/2068077/5155972/97aa8506-7257-11e4-8c98-148cffed7dcc.png)

For a demo, see http://alvinwan.com/okpy/