Focus caret at end

I don't know how much you want this, but I was bored and the more I mess around with js, the more I learn, so I went ahead and messed around.

Anyway, thanks to a somewhat simplified version of jquery.caret.js, the caret now focusses at the end of the textarea.  Additionally (after a bit of playing around as found [here][playing]) I modified the quoted section so that it's a bit more obvious that it's a quote.  Additionally, there are now two newlines between the end of the quote and the start of the new text.

[playing]: <http://www.nationstates.net/region=gotta_test_them_all>

Like I said, feel free to ignore.