Adapt styles used at jekyllrb.com

[ashmaroli]

• Import styles used at jekyllrb.com with a few minor modifications with Flexbox CSS
• Import basic layouts, includes and assets

[pathawks]

There's a whole lot here that I'm not sure we need/want. It seems like it would be beneficial to only include components in this theme that we know we will be using. (I don't think we're planning to include any tutorials, so I'm not sure what _includes/section_nav_tutorials.html is needed for. I don't think we need to duplicate all the FontAwesome assets.)

For assets that are shared between the primary Jekyll site and this theme, can we just link to the jekyllrb.com assets instead of duplicating them here? Seems like we would have a pretty good chance of hitting browser caches that way.

[pathawks]

We do not want jekyll-feed, as neither Utterson nor the plugin directory include Posts

[ashmaroli]

I'm not sure what _includes/section_nav_tutorials.html is needed for.

Oopsie! That was not meant to be included..

For assets that are shared between the primary Jekyll site and this theme, can we just link to the jekyllrb.com assets instead

👍