Blog layout updated

I just made the blog a little wider and hopefully this will make it more readable than before. Some have asked for the blog to be a percentage of the screen width, but I do not like that because then one might have blog posts that is a single row on some screens and it will be very hard to read. It also makes layout easier to have a fixed size. Hopefully this is good enough!

Please say what you think about this and also report any issues you might be having. I have just made some dirty hacks to make it wider and might have broken something in the progress!