Changed 'superman3275' to 'undercase' in README.
Changed 'superman3275' to 'undercase' in README.

mattbrictson/proof,mattbrictson/proof,undercase/proof,debbbbie/proof,undercase/proof,jcgertig/proof,mattbrictson/proof,jcgertig/proof,undercase/proof,jcgertig/proof,debbbbie/proof,debbbbie/proof