Change public folder to be a static directory

Changes the public folder to act as a static directory.  In Hapi, this is done using directory handlers.  In express, this was already done, just edited the moonboots config.

This also moves the stylesheet content out of the public directory.

Addresses issue #28 
Typically the URLS for these don't end up w/ the 'public' namespace.

Also, is there anything IN public besides robots.txt anymore?  For this example to make sense perhaps some sort of image folder w/ an example image (like a copy of https://github.com/AmpersandJS/ampersandjs.com/blob/gh-pages/public/images/logo-ampersand.png) is in order here?

Then you would have

```plugin.route({
   method: 'GET',
   path: '/images/{image*}',
   handler: {directory: {path: 'public/images'}}
});
```