New Features: Main menu & Sub-menu support

I have modified the class, so you can add the option page as main menu or submenu.

<code>
$sections = array( 
	'general' => __('General Settings'), 
	'general2' => __('General2')
);
new Custom_Theme_Options( 'My Theme Options', 'mytheme', $sections, $settings, 'edit.php', 'menu-icon-generic', '80'  );
</code>