Can't follow advide about #[no_std] in README

[vi]

It is no longer necessary to use this to achieve runtime-less operation;
just use #[start] and/or #[no_std] and avoid the runtime.

But "#[no_std] no longer works"

I think zero.rs should keep example implementation of runtime-less Rust and update it as things change in Rust. In "good times" it should be some short thing with just #[no_std] and #[start], in bad times it should also contain various workarounds to make it working.

[vi]

Maybe also there should be links to https://github.com/thestinger/rust-core/ and in general to https://github.com/mozilla/rust/wiki/Operating-system-development ?