Add some metadata for crates.io.

Cargo.toml

@@ -1,8 +1,16 @@
 [package]
 
 name = "url"
-version = "0.1.0"
+version = "0.1.1"
 authors = [ "Simon Sapin <simon.sapin@exyr.org>" ]
 
+description = "URL parser for Rust"
+documentation = "http://servo.github.io/rust-url/url/index.html"
+repository = "https://github.com/servo/rust-url"
+readme = "README.md"
+keywords = ["url", "parser"]
+license = "MIT/Apache-2.0"
+
+
 [dependencies]
 encoding = "0.2"