Add License

To make this a proper OSS project (which I think it should be) we should add a license to the project. What do you say?

My suggestion would be the MIT license.

We would need to have all authors' blessing to change this. As far as I can tell (git shortlog -s | cut -c8-), the authors are @kabadshow1, @beckmann1, @bsteinb, and I. If you a) agree with adding a license and are b) ok with MIT, please leave a mark in the following list and also write an "ok" into the comments.

What is still left to do is to add the (abbreviated) license header to the source code files.

• All authors confirm MIT license
  • @beckmann1
  • @herten1
  • @kabadshow1
  • @bsteinb
• Add license headers to source code