Revert "changed to PathBuf::from and added convert feature"

This reverts commit db777e8.

Conflicts:
	src/lib.rs

Author: lambda

src/lib.rs

@@ -10,7 +10,6 @@
 
 //! Support code for encoding and decoding types.
 
-#![feature(convert)]
 #![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/rustc-serialize/")]

src/serialize.rs

@@ -570,14 +570,18 @@ impl Decodable for path::PathBuf {
         use std::os::unix::prelude::*;
         let bytes: Vec<u8> = try!(Decodable::decode(d));
         let s: OsString = OsStringExt::from_vec(bytes);
-        Ok(path::PathBuf::from(s))
+        let mut p = path::PathBuf::new();
+        p.push(s);
+        Ok(p)
     }
     #[cfg(windows)]
     fn decode<D: Decoder>(d: &mut D) -> Result<path::PathBuf, D::Error> {
         use std::os::windows::prelude::*;
         let bytes: Vec<u16> = try!(Decodable::decode(d));
         let s: OsString = OsStringExt::from_wide(&bytes);
-        Ok(path::PathBuf::from(s))
+        let mut p = PathBuf::new();
+        p.push(s);
+        Ok(p)
     }
 }