Upgraded to latest Rust

src/codegen/main.rs

@@ -9,13 +9,12 @@ use std::io::UserDir;
 use std::io::stdio::println;
 use std::io::fs::mkdir_recursive;
 use std::path::GenericPath;
-use std::vec::Vec;
 pub mod branchify;
 pub mod keycode;
 pub mod scancode;
 
 fn main() {
-    let args = Vec::from_slice(os::args());
+    let args = os::args();
     match args.len() {
         0 => {
             println("usage: codegen [keycode|scancode].rs destdir");