Username changes

[Dimetrodon]

I have flipped a few switches in the ACP to allow registered users to change their username in their UCP. Please note however that doing this will change your login username, as the account name is the username you need to type in to login. Be careful if you decide to change your username.

Had this on top of the board for a few days but I am now relegating it to a mere post. If you haven't changed your username, then my warning can be disregarded.