Temporarily rename the crate to url_, avoid conflict with rust’s url crate.

src/url.rs

@@ -6,7 +6,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![crate_id = "url#0.1"]
+#![crate_id = "url_"]
 #![crate_type = "lib"]
 #![feature(macro_rules)]