Switch publishing to gisthost.github.io

[simonw]

OK I have a fork live here now: https://gisthost.github.io/

Here it is correctly serving a large file from your example Gist: https://gisthost.github.io/?d72bdf25360624d957210197cc35e391/page-005.html

Same thing on gistpreview does not work: https://gistpreview.github.io/?d72bdf25360624d957210197cc35e391/page-005.html

Originally posted by @simonw in #26

[simonw]

Actually I'm going to have the --gist option output that link but I'm going to have the logic in the JavaScript detect either gistpreview or gisthost when customizing search and pagination links.

[simonw]

Done - it published to https://gisthost.github.io/?e33364139d39625eda6fbbe8527f5902/index.html

[simonw]

And https://gistpreview.github.io/?e33364139d39625eda6fbbe8527f5902/index.html continues to work correctly as well.