pull extra::{serialize, ebml} into a separate libserialize crate

- `extra::json` didn't make the cut, because of `extra::json` required
   dep on `extra::TreeMap`. If/when `extra::TreeMap` moves out of `extra`,
   then `extra::json` could move into `serialize`
- `libextra`, `libsyntax` and `librustc` depend on the newly created
  `libserialize`
- The extensions to various `extra` types like `DList`, `RingBuf`, `TreeMap`
  and `TreeSet` for `Encodable`/`Decodable` were moved into the respective
  modules in `extra`
- There is some trickery, evident in `src/libextra/lib.rs` where a stub
  of `extra::serialize` is set up (in `src/libextra/serialize.rs`) for
  use in the stage0 build, where the snapshot rustc is still making
  deriving for `Encodable` and `Decodable` point at extra. Big props to
  @huonw for help working out the re-export solution for this

extra: inline extra::serialize stub

fix stuff clobbered in rebase + don't reexport serialize::serialize

no more globs in libserialize

syntax: fix import of libserialize traits

librustc: fix bad imports in encoder/decoder

add serialize dep to librustdoc

fix failing run-pass tests w/ serialize dep

adjust uuid dep

more rebase de-clobbering for libserialize

fixing tests, pushing libextra dep into cfg(test)

fix doc code in extra::json

adjust index.md links to serialize and uuid library

2 files changed, 2 insertions, 2 deletions

diff --git a/src/libsyntax/parse/mod.rs b/src/libsyntax/parse/mod.rs
index 328f0e7f221..faebd97e7c2 100644
--- a/src/libsyntax/parse/mod.rs
+++ b/src/libsyntax/parse/mod.rs
@@ -284,7 +284,7 @@ pub fn maybe_aborted<T>(result: T, mut p: Parser) -> T {
 #[cfg(test)]
 mod test {
     use super::*;
-    use extra::serialize::Encodable;
+    use serialize::Encodable;
     use extra;
     use std::io;
     use std::io::MemWriter;
diff --git a/src/libsyntax/parse/token.rs b/src/libsyntax/parse/token.rs
index f1dd844fc7c..090774ec76f 100644
--- a/src/libsyntax/parse/token.rs
+++ b/src/libsyntax/parse/token.rs
@@ -15,7 +15,7 @@ use parse::token;
 use util::interner::{RcStr, StrInterner};
 use util::interner;
 
-use extra::serialize::{Decodable, Decoder, Encodable, Encoder};
+use serialize::{Decodable, Decoder, Encodable, Encoder};
 use std::cast;
 use std::char;
 use std::fmt;