+- Removed the `bench` Cargo feature which was mostly to work around historical
+ Cargo limitations, but was solved by moving benchmarks from `src/lib.rs` to
+ `benches/bench.rs` even before those limitations were lifted. The benchmarks
+ still won’t run on anything but nightly, but that don’t signify.
+
+- Implemented `Default` on `Map` (not just on `RawMap`).
+
+- The implementation of `Into<RawMap<A>>` for `Map<A>` has been
+ replaced with the more general `From<Map<A>>` for `RawMap<A>`.