Can you also include LICENSE file in the source code

[chenrui333]

While adding the license for the formula update, I realized that the license file did not get included in the source code, can you include the LICENSE file in the source code so that when the artifact got used in somewhere the license can be cross-referenced. Thanks!

[rwos]

The license was in gti.c and README.md, but I have added a LICENSE file now, too.

[chenrui333]

Thanks @rwos!