Compressed image loading.

[jounathaen]

We can reduce the size of images further by allowing to load compressed image files. A quick test on compressing the three example images in data/ reduces their size by ~4x.

[jounathaen]

Maybe #1015 is an even better idea in this direction.

[n0toose]

as Uhyve essentially passes provided images to hermit-entry, is this something that belongs to https://github.com/hermit-os/hermit-entry?

if there's a no_std way to do this, an interesting side effect would be the potential of loading compressed images on real hardware as well (because "embedded", i guess).

cc: @Gelbpunkt, this issue might be of interest to you

[jounathaen]

I think, hermit-entry plays a different role and comes after this step in the booting/loading chain.

[fogti]

This issue would be fixed by hermit-os/hermit-entry#61.