Setup Theme Logic

Simplify the way themes are structured by:
- Including the theme as part of the files that are copied during the installation vs the npm module.
- Using a template system similar to Wordpress, where only one file is required (index.mustache) and then letting the user add additional ones to customize the appearance. The file hierarchy would be simple:
```
index.mustache
└─home.mustache
└─navigation.mustache
└─sidebar.mustache
└─content.mustache
└─footer.mustache
```
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## Guide

### Creating a Theme

To create a theme for your living style guide, first locate the theme currently used. This will be in the `theme`directory, under your `styleguide` folder (ex scr/styleguide/theme.)

Be default your theme will only contain an `index.mustache`.

Then under theme/static/styles, locate the stylesheet that you want to