Determine how to automatically compress AJAX requests to the server

[gaurav]

We currently compress ontologies using Gzip before uploading them to the reasoner. The simpler, most straightforward and most maintainable solution would be to tell the browser to compress the entire AJAX request using Content-Encoding, which NanoHTTPD and other web servers should be able to decompress automatically. This issue covers looking into how to do that.

This is low priority, since in PR #16 we compress the ontology before upload. But it would simplify our code a little to have this in. We should be able to copy the solution from phyloref/klados#182 once we solve it there.