fix staging deploy
Add base style libraries

* Add `Bourbon` to `Gemfile` for style support.
* Add `Neat` to `Gemfile` for grid and layout support.
* Add `Bitters` to `source/stylesheets/` for base styles.
* Remove error and flash styles for Middleman
Update sidebar nav with new sitemap
Reorganize navigation to match new sitemap

* Add new sections
* Add translations for new sections
Add files for new sections
Move larger sections to partials