generate people thumbnails for classes & people page

[moisestech]

Should be 100px

[caseyg]

Closed by @ofZach in 81912fe:

I also tried to shrink some images, using sips... things like this helped:

sips -Z 400 *.jpg --setProperty formatOptions 95
(resize to fit within 400 width keep aspect ratio all jpgs in place quality 95)

sips -Z 50 *.png

(resize to fit in with 50 all pngs)

I did the people images for the classes page, and the courses images, I think there's more work that can be done. It probably makes sense to use a jeckyll image plugin for generating things like this but I didn't have time to get into that.

Will open a separate enhancement issue for automating this with a jekyll plugin.

[ofZach]

I didn't really finish this so re-opening -- there's still a lot of big images to make smaller