Add doc url to the crates

Author: alexcrichton

src/lib.rs

@@ -362,6 +362,9 @@
 #![allow(unknown_features)]
 #![feature(macro_rules, slicing_syntax, globs)]
 #![deny(missing_docs)]
+#![doc(html_logo_url = "http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
+       html_favicon_url = "http://www.rust-lang.org/favicon.ico",
+       html_root_url = "http://doc.rust-lang.org/regex/")]
 
 #[cfg(test)]
 extern crate "test" as stdtest;