Add François-René Rideau as ~nyt

This is based on a patch sent by François-René Rideau to the Urbit
developers' mailing list:

https://groups.google.com/d/msg/urbit-dev/s3i-oORXNm8/uzgrY3EkL5UJ

The claim is based on solving the Nock Challenge in 2010. To keep the
line within 80 characters, I have abbreviated the name to "F. Rideau".
Merge pull request #65 from ab9/nyt_token

Add François-René Rideau as ~nyt