Please add a licence to this repository

[semicolonTransistor]

Hi, 254. I am from 1218, we have been using your amazing code for motion profiling on our robot this year. It is very noble of you to share this powerful library with the FIRST Community. However, I've noticed that your repository does not include a license and I think you should include a FOSS license. It allows other people to build off of your software under clear conditions and protects you from possible Warranty/CopyRight issues. I would recommend the MIT Licence but it is ultimately your choice. Github has this website to help with that. Thanks again for your generous contributions to the community.

Jinyu Liu