Gabe tag decorators

[byxorna]

Add docs for tag decorators

[byxorna]

@joshrabinowitz @maddalab @Primer42

[william-richard]

@byxorna - there's something broken on this branch. When I try to build and host it locally, it fails. Not quite sure what, as you didn't make super big changes, but somethings up.

[byxorna]

@Primer42 Is it this? Your site is using Maruku, the default Markdown interpreter. Maruku is now obsolete and may cause builds to fail for sites with invalid Markdown or HTML. See https://help.github.com/articles/migrating-your-pages-site-from-maruku for more information on upgrading to a newer Markdown interpreter.

I just started getting this as well.

[william-richard]

@byxorna - nope, when I tried to run jekyll on your branch, it built and didn't give any warnings, but wouldn't let me access it from my local host. I saw hat same Maruku error when I ran on the gh-pages branch, but not on this branch. I'll play with it a bit more now.

[william-richard]

@byxorna - don't mind me, I just didn't actually check out your branch.
LGTM 👍 🌳 🎉