Minor new features: news and tour

... if you're reading this, you probably came from a new sidebar that shows recent site news on the front page!

The site news sidebar will show a few recent posts from the official blog (i.e., this). If, out of some fit of laziness, I don't update the official blog for awhile then the sidebar will automatically hide itself, and will return just as automatically when there is a new post.

The other new feature is the site tour. The tour is an attempt to explain many of the site's features. I always thought they were obvious but I learned that when showing the site to new people in person they often didn't understand what different parts of the site were doing. The curse of knowledge in action! Since I can't show the site to everyone in person, I created a screengrab-heavy page with an explanation of the site's features (and foibles).