Replace serde1 with serde2!

Closes #26!

src/lib.rs

@@ -1,17 +1,10 @@
-#![feature(collections, core, hash, io, std_misc, plugin, unicode)]
-#![plugin(serde_macros)]
+#![feature(core, io, path, std_misc, unicode)]
 
 extern crate unicode;
 
-pub use de::{Deserializer, Deserialize};
-pub use ser::{Serializer, Serialize};
+pub use ser::{Serialize, Serializer};
+pub use de::{Deserialize, Deserializer, Error};
 
-pub mod de;
 pub mod ser;
+pub mod de;
 pub mod json;
-
-// an inner module so we can use serde_macros.
-mod serde {
-    pub use de;
-    pub use ser;
-}