Accessibility

[bradygm]

Address accessibility issues: https://wave.webaim.org/report#/https://theairlab.org/

[smash0190]

Can somebody volunteer for this?

[jfkeller]

I added a language tag that was missing in this commit 09120b0.

I think the rest of the issues WAVE reports are ok to ignore. Most of the are the following:

• No text on some links, but these have images instead, for example the twitter icon link at the bottom of the page.
• Alt text on images is the same as the title of the articles they link to. I think this is fine.
• Some text looks like a heading but isn't using a heading tag. The text still looks ok.
• It thinks some of the buttons on the Publications don't have text but they actually do.

[bradygm]

Commit 124ab8cc8659c4249c369994f889fd1b32fbc086 fixed most of the errors. Now we just have occasional warnings, as mentioned in the above comment by John. We could periodically revisit this and check the website.