Change Log
====

0.3.6:

* Add serde (de)serialisation support (`--features=serde`)
* Optionally use a `BTreeMap` instead of a `HashMap` as the backing map (`--features=btreemap`)

0.3.5:

* Enable README rendering on crates.io (no code changes).

0.3.4:

* Allow keys to have lifetimes other than 'static.
