Added a hit counter

Just for fun. It started a 0, so it's like a trip odometer, not like your "regular" odometer. Since this blog's been around for a while, it'll only be good for me to judge the rate of hits, not the actual total hits. But that's OK. I'm not doing this because I want real, important statistics or anything. Just a quick and dirty gauge of how many people might be seeing this blog but not commenting.