Update README.md (#1479)
Update README.md (#1479)

update readme to fix broken gh-pages at http://mesosphere.github.io/universe/

BuoyantIO/universe,yuchaoran2011/universe,madanadit/universe,AppliedIS/universe,mesosphere/universe,AppliedIS/universe,AppliedIS/universe,yuchaoran2011/universe,BuoyantIO/universe,BuoyantIO/universe,madanadit/universe,mesosphere/universe,yuchaoran2011/universe,madanadit/universe