Some minor updates to the template

I've made some minor updates to my template to try to improve the readability of the site a little bit. Everything looks good on my monitor, but please let me know if something's wonky on yours.

Update: Keith tells me it looked squished and I'm guessing he meant on "normal" resolution monitors versus the wide-aspect monitors/laptops I have available to me. I've tweaked the sidebar widths so it shouldn't see quite so squished now. I hope. Let me know otherwise.