Licensed under either of

 * Apache License, Version 2.0
   (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0\)
 * MIT license
   (LICENSE-MIT or http://opensource.org/licenses/MIT\)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
dual licensed as above, without any additional terms or conditions.
