[rust-dev] library editing

Hi, After some consultation with the rest of the core rust developer group, I've posted some new guidelines concerning editing rust's libraries: https://github.com/mozilla/rust/wiki/Libs https://github.com/mozilla/rust/wiki/Library-editing In particular, the point of these is to _expedite library evolution_ by providing specific, objective (ish) criteria for library development, and introducing an additional project role ("library editors"), who are permitted to review conforming library work and have bors auto-merge it. These guidelines are mostly my own preferences, along with feedback from the other core developers; if you think these guidelines are bogus of course now is a good time to say so. My goal is to expand, in a controlled and predictable fashion, the set of people with ownership over our our libraries. Please let me know if you have any additional thoughts on the matter; I'm naturally a little uncertain about how to proceed here but I'm feeling like the core moco-employees are a bit of a bottleneck to library-evolution, and now that the language itself is stabilizing (ish) it might be a good time to invite more people to participate in the libraries. -Graydon