Missing licence in repository

[liuw]

Hi,

I discover there is neither COPYING nor LICENCE / LICENSE file inside this repository. Could you please clarify which licence is applied to this repository?

Thanks,
Wei.

[jhertz]

as one of the co-authors of this code, I retroactively vote that it be placed under the MIT License.

if @timnewsham agrees, then consider it released under the MIT License.