Minor comment system improvements
I should have made these a long time ago: thanks Nat for reminding me ;) Comments no longer require an email address, and provide a proper error page with the comment intact if you forget to enter your name. They also now add http:// on to your site URL for you if you forget to enter it yourself. I added the last feature in the code that displays the comments, so it should fix all of the older comments with invalid URLs as well.
I plan to have another go at the signing prototype and fix some of the bugs in the current version some time next week.