In function unn_admin_menu() change 8 to 'manage_options'
Before: add_options_page('Ultimate Noindex Nofollow Options', 'Ultimate Noindex', 8, __FILE__, 'unn_admin');
After: add_options_page('Ultimate Noindex Nofollow Options', 'Ultimate Noindex', 'manage_options', __FILE__, 'unn_admin');
Fixes: Notice: has_cap was called with an argument that is deprecated since version 2.0! Usage of user levels by plugins and themes is deprecated. Use roles and capabilities instead.
Fix for 13 undefined errors: I refactored the unn_admin_menu() function to fix all the errors. You can find it here: https://gist.github.com/anonymous/5730886