Add some more descriptive data to README and Cargo.toml

Cargo.toml

@@ -5,6 +5,8 @@ authors = ["The Servo Project Developers"]
 description = "Geometry primitives"
 documentation = "https://docs.rs/euclid/"
 repository = "https://github.com/servo/euclid"
+keywords = ["matrix", "vector", "linear-algebra", "geometry"]
+categories = ["science"]
 license = "MIT / Apache-2.0"
 
 [features]

README.md

@@ -1,5 +1,8 @@
 # euclid
 
-This is a small library for geometric types.
+This is a small library for geometric types with a focus on 2d graphics and
+layout.
 
-[Documentation](https://docs.rs/euclid/)
+* [Documentation](https://docs.rs/euclid/)
+* [Release notes](https://github.com/servo/euclid/releases)
+* [crates.io](https://crates.io/crates/euclid)