Gorillas, Replies, and prose book descriptions in Site Updates

Nothing earth shattering here, but here's some minor tweaks:

• You should never see this, but there's a Permission Denied page with an annoyed gorilla (to compliment the sad panda error pages). For example, if you wanted to be clever and try editing this entry by using this link: www.prosebox.net/entry/edit/1179 - you should see the annoyed gorilla if you are not me.

• I wrote an entry not too long ago explaining how Prosebox replies work, and that it's pointless to reply to your own comment on here. I took that a step further and removed reply buttons under your own comments. That should make it more intuitive to use the correct reply button for multiple replies.

• I've seen a lot of new people show up and write a daily entry inside the book description (which nobody can comment on, since that's not what it's for. I added a note on that screen to clarify that it's an optional description of entries to be written.