License file

Hi,

Looking at the file headers, I have seen the license under which this repository is licensed is Apache-2.0. Could you please add it to the License section here?

On the other hand, could you please check the README file and update the section mentioning the license? There is a line which mentions MIT as the license, and I think it should be Apache-2.0.

Feel free to come back to me in case of questions.

Thanks!