Routines for the pywwt notebook server extension.
Most users of pywwt can ignore this module.
In order to make files available to the WWT engine, we need to serve them over
HTTP. Most of this is now done using the
extension, but we also provide a separate server extension that provides a
static copy of the WWT research app, for environments where security cookies
prevent an externally-hosted version of the app (i.e., wwtassets.org) from
accessing data served up by the kernel.
A support function used to integrate pywwt with Jupyter.