Housekeeping

I should have been doing this all along, but after 9 1/2 years (!) it's about time I start making this feature a little easier to search. I will be putting labels on posts going forward and I'm also going to start going back through the archives to add labels to old posts. Counting this post, we have 4,638 active posts on this blog, so it's going to take time to get this project done. In the end, it should be worth it.