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
│   ├── carrot.html
│   ├── index.html
│   └── public
│       ├── index.html
│       └── theme
│           ├── index.html
├── index.sneak
  ```
- output the uncompiled file to `/.peak` 
- output the uncompiled file to `/.peak/public/theme` wrapped in a webpage, accessible via `localhost:1111/theme`.