Include a usage example in the README

[svenstaro]

I really like it when READMEs show how to properly use a project to quickly get a feel for it. I think it would make the project more approachable in this case as well.

[SOF3]

All the details are https://docs.rs/include-flate/0.1.3/include_flate/macro.flate.html here. Is it really necessary to copy them to readme?

[svenstaro]

Well, it's not necessary but it would increase discoverability. Your README also definitely still has vertical space for this.