** Removed depricated rustc-serialize support
Rustc-serialize was a stopgap until projects like Serde were able to catch up.
With macros stabilization on its way, we are able to switch to serde without any
big user-friendliness issues. Major congratulations to Serde for coming this far!
** Moved Refbox, Strbox and Slicebox into a "refbox" module
Refbox, Strbox and Slicebox are still an integral piece of bincode, but since
they are mainly used by power-users, this move will make the crate API more organized
and easier for new users to understand.
** Upgraded to Serde 0.9.*
Serde 0.9.* gives us a better API surface area and allows use of procedural macros for
deriving serialize and deserialize implemenetations.
** Moved serde functions into global module
Since serde is the only supported serialization mechanism, it makes sense to have these
functions available at the top level.
** Added the ability to chose your own endian encoding.
This functionality is located in the endian_choice module.
** Changed SizeLimit to be a trait instead of an enum
Mostly for performance reasons.
** Removed RefBox / StrBox / SliceBox
Since rustc-serialize support was phased out, you can use `Cow<T>` with serde.