Compressed assets

Hi,

I wonder if it's possible to modify the public API of this library in a way that would allow embedding of compressed assets? The idea is to apply the most aggressive gzip compression on JS/CSS assets as part of a build pipeline, so that they are served directly as gzipped resources without having to spend CPU cycles on on-the-fly encoding.

Start by reviewing the library's public API and the asset embedding/build-pipeline entry points; the issue does not name specific files or tests. Define how compressed JS/CSS assets would be represented and served directly, then verify that the API supports precompressed resources without on-the-fly encoding.

Written by the indexing model from the issue text.