Update README.md

Added a LevelDB binding.

README.md

@@ -398,6 +398,8 @@ See also [http://areweideyet.com/](http://areweideyet.com/) and [Rust and IDEs](
     * [jimmycuadra/rust-etcd](https://github.com/jimmycuadra/rust-etcd) [[etcd](https://crates.io/crates/etcd)] — A client library for CoreOS's etcd. [<img src="https://travis-ci.org/jimmycuadra/rust-etcd.svg?branch=master">](https://travis-ci.org/jimmycuadra/rust-etcd)
   * ForestDB
     * [vhbit/sherwood](https://github.com/vhbit/sherwood) — [ForestDB](https://github.com/couchbase/forestdb) bindings [<img src="https://travis-ci.org/vhbit/sherwood.svg?branch=master">](https://travis-ci.org/vhbit/sherwood)
+  * LevelDB
+    * [skade/leveldb](https://github.com/skade/leveldb) - [LevelDB](https://github.com/google/leveldb) bindings [<img src="https://travis-ci.org/skade/leveldb.svg?branch=master">](https://travis-ci.org/skade/leveldb)
   * LMDB [[lmdb](https://crates.io/keywords/lmdb)]
     * [vhbit/lmdb-rs](https://github.com/vhbit/lmdb-rs) [[lmdb-rs](https://crates.io/crates/lmdb-rs)] — [LMDB](http://symas.com/mdb/) bindings [<img src="https://travis-ci.org/vhbit/lmdb-rs.svg?branch=master">](https://travis-ci.org/vhbit/lmdb-rs)
   * MongoDB [[mongodb](https://crates.io/keywords/mongodb)]