Add build status badge to README
Add build status badge to README
atlarge-research/graphalytics-platforms-graphmat,atlarge-research/graphalytics-platforms-graphmat,atlarge-research/graphalytics-platforms-graphmat,tudelft-atlarge/graphalytics-platforms-graphmat,tudelft-atlarge/graphalytics-platforms-graphmat,tudelft-atlarge/graphalytics-platforms-graphmat