Closes #210

Fix #204

From #191

And fix bug with taxonomies urls

* Added inital trailing_slash impl

* Added simple test

* Updated docs website to use trailing_slash option

* Updated documentation to reflect new trailing_slash option

* Added combined cachebust and trailing_slash test

Useful if you are, e.g., generating an index of blog posts.

This removes the dependency cycle between config and rendering that
causes 4 packages to be recompiled every time a change is made.

I just want to code fast!

* Finishing up site

* Make site a bit responsive

* Fix menu responsiveness

* Remove Fira Sans and revamp a bit text

* Update list of syntax and change output of syntax

* Add Rust mention

* Some doc tweaks

* Correct capitalization for GitHub

Correct capitalization for GitHub

* Some CSS tweaks

* More css tweaks + favicon

* Add link to my site

And some tweaks as I write the docs