* Update installation.md

* Update cli-usage.md

* Update installation.md

* Update directory-structure.md

* Update configuration.md

* Update overview.md

* Update section.md

* Update page.md

* Update section.md

* Update configuration.md

* Update page.md

* Update section.md

* Update page.md

* Update shortcodes.md

* Update linking.md

* Update table-of-contents.md

* Update syntax-highlighting.md

* Update taxonomies.md

* Update search.md

* Update sass.md

* Update index.md

* Update multilingual.md

* Update overview.md

* Update pages-sections.md

* Update pagination.md

* Update taxonomies.md

* Update rss.md

* Update sitemap.md

* Update robots.md

* Update 404.md

* Update archive.md

* Update overview.md

* Update installing-and-using-themes.md

* Update creating-a-theme.md

* Update netlify.md

* Update github-pages.md

* Update gitlab-pages.md

* Update index.md

* Update page.md

* Update section.md

* Updates.

* Add hard_link_static config option.

* Copy or hardlink file depending on an argument.

Modify the call sites for `copy_file` to account for the extra argument.

* Plug the config setting through to copy_file.

Don't apply the config option to theme's static directory.

* Update documentation.

* Backticks make no sense in this comment.

* Addressing PR comments.

* Be consistent with argument naming.

Close #686

- Fix some typos
- Some small changes to documentation to make it more clear
- Change the themes list from text to links

And some tweaks as I write the docs