Updated readme to reflect changes to input/output formats
Updated readme to reflect changes to input/output formats

kunallillaney/thunder,jwittenbach/thunder,broxtronix/thunder,broxtronix/thunder,kunallillaney/thunder,oliverhuangchao/thunder,thunder-project/thunder,poolio/thunder,j-friedrich/thunder,kcompher/thunder,zhwa/thunder,mikarubi/thunder,pearsonlab/thunder,zhwa/thunder,oliverhuangchao/thunder,poolio/thunder,j-friedrich/thunder,kcompher/thunder,pearsonlab/thunder,mikarubi/thunder