Add license

[nbianca]

No description provided.

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @brson (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

Please see the contribution instructions for more information.

[John-Steidley]

This is meant to only fix the license, correct? You should remove the first commit from this PR.

[brson]

Thanks! I'll have to take a closer look at the status of the contributions here before applying this.

[steveklabnik]

The first commit here is already merged, but since the parent repo isn't around, and @nbianca hasn't responded in a very long time, I'm going to give this a close. We should have a license here, but I'd prefer the standard license we use for everything else, and we'll need all 66 contributors to sign off.