Improve result ranking

When I search for perf4j (or things like slf4j, or junit), the first result is something like net.sf.seam.perf4j, then org.perf4j. I would have expected org.perf4j to be returned first.

In this case it is not that bad because there is only two results, but the other examples I gave it is pretty bad because there are many many results and more than often I have to scroll to see the actual result.