Fixed commands. Fixed spelling mistake which caused nothing to work. Tested things, they should all work now...
Changes: Fixed bug #1: Usernames shouldn't be case-sensitive. Fixed bug #2: Adding a world without giving a name causes a server crash. Added /pwgm include <player> (Opposite of /pwgm exclude). Rewrote config to be easier/ more extensible. (You will need to set up worlds again) If a world has no gamemode setting, it defaults to the server's default gamemode instead of hanging in limbo.