Add a license

[arthurvr]

This repo seems to miss a license. https://github.com/sindresorhus/awesome/blob/master/awesome.md#choose-an-appropriate-license :)

[hi5]

Perhaps adding the same license as https://github.com/bayandin/awesome-awesomeness:

## License

[![Creative Commons License](http://i.creativecommons.org/l/by/4.0/88x31.png)](http://creativecommons.org/licenses/by/4.0/)

This work is licensed under a [Creative Commons Attribution 4.0 International License](http://creativecommons.org/licenses/by/4.0/).

:question:

[arthurvr]

Lgtm

[vasili111]

Yes it definitely needs license. I added "Creative Commons Attribution 4.0 International License" as it was suggested. We can also add other licenses if you think is necessary.

[arthurvr]

Yay! Thanks :)

[joedf]

Very nice :+1:

[vasili111]

I think that we can have several licences. What about adding Public domain license too? It is quite good open licence.