ena 0.2.0

Union-find, congruence closure, and other unification code. Based on code from rustc.
Documentation 
[package]
name = "ena"
description = "Union-find, congruence closure, and other unification code. Based on code from rustc."
license = "MIT/Apache-2.0"
homepage = "https://github.com/nikomatsakis/ena"
repository = "https://github.com/nikomatsakis/ena"
version = "0.2.0"
authors = ["Niko Matsakis <niko@alum.mit.edu>"]