Investigate automatic wasm copying for jupyterlab webpack

[timkpaine]

see this and this

"Basically, if you import a file that is prefixed by JUPYTERLAB_(RAW|URL|FILE)LOADER, it will use that particular webpack loader. So if in your build step, you copy the relevant files to your build directory and prefix them with JUPYTERLAB_FILE_LOADER_, they can be bundled up with webpack using its file loader"

[texodus]

Thanks, a fix for this has been merged and will be in the 0.1.18 release.

The Jupyter Lab plugin should no longer require additional assets.