Use the correct log crate and setup env_logger in main.

components/webdriver_server/Cargo.toml

@@ -20,6 +20,7 @@ git = "https://github.com/jgraham/webdriver-rust.git"
 git = "https://github.com/servo/rust-png"
 
 [dependencies]
+log = "*"
 rustc-serialize = "0.3.4"
 url = "0.2.35"
 uuid = "*"

components/webdriver_server/lib.rs

@@ -5,7 +5,7 @@
 #![crate_name = "webdriver_server"]
 #![crate_type = "rlib"]
 
-#![feature(rustc_private, ip_addr)]
+#![feature(ip_addr)]
 
 #[macro_use]
 extern crate log;