Thread:Announcements/Changes on October 19 and 20

I've deployed a series of updates over the past few days, here are some of them:
 * AJAX for posting and replying. Note that there are some known issues with these not showing up immediately after they're posted.
 * Threads are now marked as read when you reply to them.
 * Tweaked the auto-scrolling for the edit box a little.
 * Started tweaking the toolbar, eventually we want it to look something like one of these mockups:.