🇬🇧United Kingdom @emmajane

Documentation update:

Documentation was added in #46, but the issue is still marked as, "Needs documentation." I've given the documentation at http://drupal.org/update/modules/6/7#system_admin_menu_block_access a quick edit to improve clarity. For now I'm going to remove the "needs documentation" tag. If/when the issue does get rolled back, please re-mark as "needs documentation." Thanks!