[WIP] Output Tumblr theme file

Working on a pragmatic approach to outputting a Tumblr theme to easily and practically copy to Tumblr.  
> Note: this branch also includes a cleanup and refactor of `lib/index.js`.

So far, I've:
- restructured the tree:

  ```
  ├── .peak
  │   ├── index.html
  │   └── public
  │       └── index.html
  └── index.sneak
  ```

- output the uncompiled file to `/.peak` (useful if you're [sneak](http://www.github.com/nporteschaikin/sneak)in')

Still thinking about how to approach grabbing the uncompiled file.  Some ideas:
- Add it to clipboard, although cross-OS compatibility is shaky.  Any great modules for this?
- Open a browser with the HTML output.

If anyone has any suggestions, let me know.