allow per post authorship

[sssoz]

This was already done as part of #49

[JosephMcArthur]

Would be good if the author box responded to the new author yaml

[sssoz]

See https://github.com/sparcopen/infrastructure/issues/72#issuecomment-648958495

[sssoz]

Author box + /about page include data from _data/authors.yml now.

[JosephMcArthur]

• [x] the below are just a touch too close together to be easily tab-able on mobile I think

• [x] a taste issue with me maybe, but I think a little more padding here would help

• [x] how big of a pain is it to have sparc* more centred? I realise the image likely is, but it feels unaligned

[sssoz]

the below are just a touch too close together to be easily tab-able on mobile I think

Done, but also changed the typeface to the sans-serif one, just so it's a bit more consistent with the other infobox links & stands out from the rest of the text.

how big of a pain is it to have sparc* more centred? I realise the image likely is, but it feels unaligned

You’re right, it is not centered -- it’s aligned to the left. Thing is, it’ll always look weird on different devices because of the padding around the infobox box.

This is what it looks like when it’s "properly" aligned:

You can see that extra padding on the left from its container makes it look off-center:

...so I made it full-width with a padding on the right side, same size as the container’s. Hope that’s okay; the logo is much bigger now.

Pushed to dev!