Highlight that we require nightly in the README
Highlight that we require nightly in the README

graydon/rust,rust-lang/rustfmt,SingingTree/rustfmt,Emilgardis/rustfmt,aidancully/rust,studoot/rustfmt,graydon/rust,aidancully/rust,graydon/rust,rust-lang/rustfmt,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,flutterhash/rustfmt,studoot/rustfmt,Emilgardis/rustfmt,graydon/rust,aidancully/rust,aidancully/rust,SingingTree/rustfmt