Extra domain info

Added domains crawled and uncrawled to links page.
Yea it (the bool flag) was for the segments. But I was on the fence about that flag b/c it adds little. So I yanked it. I also implemented the running count you suggested above. I'm not sure if I think it is worth the extra mess (It doesn't have to iterate the map in this configuration, but it has to do some more bookkeeping per link, so not sure the performance gain is there). But, there the implementation is. If we really want to get serious about it (in the future) we may have to use everyones favorite struct "cell", pick out the last time-sequenced link, and count without creating a map. That seemed overkill at this point to me though.