Disable Jekyll processing for github

"The page build failed with the following error: page build failed"

Seeing if this makes a difference.
Documentation seems sparse, as most pertain to Jekyll specific projects,
and the error is rather general.

The site should be static, in any case.
Relate Map bubble area to instances

Also set a sane maximum bubble size.

Previously, it operated on a logarithmic scale, which meant some bubbles
weren't being given their due weight.

Thanks to Nard for the suggestion!