Removed lang & dir overrides, copyright notice

They added 2 confusing, user-unfriendly Theme Options for not much gain. Looking up the actual codes to use for lang="" has less help devoted to it than possibly any other web development aspect, frustrating users. Recommend building themes devoted to specific languages/language families instead.

Also removed the copyright notice to strike off one more Theme Option. A visible notice is only (barely) important for anyone who is deeply invested in their content, and at that point they'd be best suited writing it themselves.