Investigate implementing an ECMA 402-based internationalization library

[alexcrichton]

We have been told that internationalization is pretty standardized at this point on the web and many languages are starting to follow along. The authoritative spec for this is located here, and it sounds like we shouldn't deviate from that spec much (as it's what everyone is expecting).

Nominating, but I do not believe this is a 1.0 issue.

[alexcrichton]

I have also been told that this would be called libintl.

cc @zbraniecki

[brson]

P-high, not 1.0

[steveklabnik]

I'm pulling a massive triage effort to get us ready for 1.0. As part of this, I'm moving stuff that's wishlist-like to the RFCs repo, as that's where major new things should get discussed/prioritized.

This issue has been moved to the RFCs repo: rust-lang/rfcs#858