Update links to docs.rs

Cargo.toml

@@ -3,7 +3,7 @@ name = "rustyline"
 version = "1.0.0"
 authors = ["Katsu Kawakami <kkawa1570@gmail.com>"]
 description = "Rustyline, a readline implementation based on Antirez's Linenoise"
-documentation = "http://kkawakam.github.io/rustyline/rustyline"
+documentation = "http://docs.rs/rustyline"
 repository = "https://github.com/kkawakam/rustyline"
 readme = "README.md"
 keywords = ["readline"]

README.md

@@ -6,7 +6,7 @@
 
 Readline implementation in Rust that is based on [Antirez' Linenoise](https://github.com/antirez/linenoise)
 
-[Documentation](https://kkawakam.github.io/rustyline)
+[Documentation](https://docs.rs/rustyline)
 
 **Supported Platforms**
 * Linux