minor changes in README
minor changes in README

ssvlab/dsverifier,ssvlab/dsverifier,hussamaibrahim/dsverifier,ssvlab/dsverifier,hussamaibrahim/dsverifier,ssvlab/dsverifier,hussamaibrahim/dsverifier,ssvlab/dsverifier,hussamaibrahim/dsverifier,ssvlab/dsverifier,hussamaibrahim/dsverifier,hussamaibrahim/dsverifier,ssvlab/dsverifier