Mainly small install script improvements - Consistent usage of `$LUANHOME`, removed reliance on current directory. - Made Luan build and install fine (on Linux) without requiring launching it via sudo. Only asks to elevate privileges if installation failed. - Minor spelling mistake fix.

package goodjava.mail;


public class MailException extends Exception {

	public MailException(String msg) {
		super(msg);
	}
}