fix travis status bars in README
fix travis status bars in README

qiyunzhu/horizomer,biocore/WGS-HGT,ekopylova/WGS-HGT,biocore/WGS-HGT,qiyunzhu/horizomer,ekopylova/WGS-HGT,biocore/WGS-HGT,ekopylova/WGS-HGT,qiyunzhu/horizomer