Changes to admin bar and main blog

I changed the background on the admin bar to be all black instead of fading from gray to black. It makes it easier to read the links on the left. I also changed the main blog a little. You now have the two most recent posts, the five most active blogs, and the five most recently updated blogs in the sidebar. I took the most recent posts out of the main text area. I also changed the login form so that logged in users get the option to create another blog.